Scimago Journal & Country Rank

Proceedings of the National Academy of Sciences of the United States of America

CountryUnited States
648
H Index
Subject Area and CategoryMultidisciplinary
Multidisciplinary
PublisherNational Academy of Sciences
Publication typeJournals
ISSN10916490, 00278424
Coverage1949-1951, 1961-ongoing
Scope PNAS is one of the world"s most-cited multidisciplinary scientific serials. Since its establishment in 1914, it continues to publish cutting-edge research reports, commentaries, reviews, perspectives, colloquium papers, and actions of the Academy. Coverage in PNAS spans the biological, physical, and social sciences. PNAS is published weekly in print, and daily online in PNAS Early Edition. The PNAS impact factor is 9.38 and the Eigenfactor is 1.7 for 2008. PNAS is available by subscription. (source)
Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

CategoryYearQuartile
Multidisciplinary1997Q1
Multidisciplinary1998Q1
Multidisciplinary1999Q1
Multidisciplinary2000Q1
Multidisciplinary2001Q1
Multidisciplinary2002Q1
Multidisciplinary2003Q1
Multidisciplinary2004Q1
Multidisciplinary2005Q1
Multidisciplinary2006Q1
Multidisciplinary2007Q1
Multidisciplinary2008Q1
Multidisciplinary2009Q1
Multidisciplinary2010Q1
Multidisciplinary2011Q1
Multidisciplinary2012Q1
Multidisciplinary2013Q1
Multidisciplinary2014Q1
Multidisciplinary2015Q1
Multidisciplinary2016Q1
SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

YearSJR
19998.271
20007.731
20017.192
20027.183
20037.018
20047.026
20056.784
20066.734
20076.766
20086.899
20096.913
20106.769
20116.771
20126.792
20136.989
20146.853
20156.767
20166.321
Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)199910.191
Cites / Doc. (4 years)200010.636
Cites / Doc. (4 years)200111.035
Cites / Doc. (4 years)200211.338
Cites / Doc. (4 years)200311.089
Cites / Doc. (4 years)200411.451
Cites / Doc. (4 years)200511.616
Cites / Doc. (4 years)200611.370
Cites / Doc. (4 years)200711.158
Cites / Doc. (4 years)200810.717
Cites / Doc. (4 years)200910.844
Cites / Doc. (4 years)201011.186
Cites / Doc. (4 years)201111.467
Cites / Doc. (4 years)201211.812
Cites / Doc. (4 years)201311.704
Cites / Doc. (4 years)201411.420
Cites / Doc. (4 years)201510.836
Cites / Doc. (4 years)201610.089
Cites / Doc. (3 years)199910.191
Cites / Doc. (3 years)200010.791
Cites / Doc. (3 years)200111.233
Cites / Doc. (3 years)200211.334
Cites / Doc. (3 years)200311.003
Cites / Doc. (3 years)200411.326
Cites / Doc. (3 years)200511.351
Cites / Doc. (3 years)200611.136
Cites / Doc. (3 years)200710.699
Cites / Doc. (3 years)200810.482
Cites / Doc. (3 years)200910.602
Cites / Doc. (3 years)201010.874
Cites / Doc. (3 years)201111.166
Cites / Doc. (3 years)201211.456
Cites / Doc. (3 years)201311.332
Cites / Doc. (3 years)201411.048
Cites / Doc. (3 years)201510.454
Cites / Doc. (3 years)20169.869
Cites / Doc. (2 years)19999.942
Cites / Doc. (2 years)200010.678
Cites / Doc. (2 years)200110.896
Cites / Doc. (2 years)200210.974
Cites / Doc. (2 years)200310.579
Cites / Doc. (2 years)200410.835
Cites / Doc. (2 years)200510.920
Cites / Doc. (2 years)200610.414
Cites / Doc. (2 years)200710.180
Cites / Doc. (2 years)20089.931
Cites / Doc. (2 years)20099.995
Cites / Doc. (2 years)201010.330
Cites / Doc. (2 years)201110.557
Cites / Doc. (2 years)201210.766
Cites / Doc. (2 years)201310.614
Cites / Doc. (2 years)201410.407
Cites / Doc. (2 years)20159.914
Cites / Doc. (2 years)20169.338
Total Cites 
Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

CitesYearValue
Self Cites19992783
Self Cites20002900
Self Cites20013291
Self Cites20023271
Self Cites20033175
Self Cites20043302
Self Cites20053421
Self Cites20063249
Self Cites20073451
Self Cites20083433
Self Cites20093477
Self Cites20103425
Self Cites20113359
Self Cites20123535
Self Cites20133748
Self Cites20143437
Self Cites20153112
Self Cites20162845
Total Cites199982832
Total Cites200086144
Total Cites200188753
Total Cites200287848
Total Cites200388376
Total Cites200493364
Total Cites200599550
Total Cites2006101082
Total Cites2007103579
Total Cites2008105658
Total Cites2009110177
Total Cites2010117641
Total Cites2011123944
Total Cites2012128539
Total Cites2013128030
Total Cites2014126737
Total Cites2015120777
Total Cites2016109677
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

CitesYearValue
External Cites per document19999.849
External Cites per document200010.428
External Cites per document200110.817
External Cites per document200210.912
External Cites per document200310.608
External Cites per document200410.926
External Cites per document200510.961
External Cites per document200610.778
External Cites per document200710.343
External Cites per document200810.141
External Cites per document200910.268
External Cites per document201010.557
External Cites per document201110.864
External Cites per document201211.141
External Cites per document201311.000
External Cites per document201410.749
External Cites per document201510.185
External Cites per document20169.613
Cites per document199910.191
Cites per document200010.791
Cites per document200111.233
Cites per document200211.334
Cites per document200311.003
Cites per document200411.326
Cites per document200511.351
Cites per document200611.136
Cites per document200710.699
Cites per document200810.482
Cites per document200910.602
Cites per document201010.874
Cites per document201111.166
Cites per document201211.456
Cites per document201311.332
Cites per document201411.048
Cites per document201510.454
Cites per document20169.869
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
199923.75
200029.31
200128.49
200226.97
200331.28
200430.98
200532.67
200633.79
200735.63
200836.79
200939.03
201038.10
201138.41
201241.77
201341.45
201442.79
201542.26
201644.99
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

DocumentsYearValue
Non-citable documents1999345
Non-citable documents2000454
Non-citable documents2001515
Non-citable documents2002596
Non-citable documents2003603
Non-citable documents2004612
Non-citable documents2005604
Non-citable documents2006635
Non-citable documents2007743
Non-citable documents2008785
Non-citable documents2009934
Non-citable documents20101090
Non-citable documents20111270
Non-citable documents20121360
Non-citable documents20131425
Non-citable documents20141583
Non-citable documents20151662
Non-citable documents20161769
Citable documents19998128
Citable documents20007983
Citable documents20017901
Citable documents20027751
Citable documents20038032
Citable documents20048243
Citable documents20058770
Citable documents20069077
Citable documents20079681
Citable documents200810080
Citable documents200910392
Citable documents201010819
Citable documents201111100
Citable documents201211220
Citable documents201311298
Citable documents201411471
Citable documents201511553
Citable documents201611113
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

DocumentsYearValue
Uncited documents1999593
Uncited documents2000597
Uncited documents2001542
Uncited documents2002538
Uncited documents2003551
Uncited documents2004515
Uncited documents2005565
Uncited documents2006642
Uncited documents2007764
Uncited documents2008763
Uncited documents2009890
Uncited documents2010922
Uncited documents2011986
Uncited documents20121060
Uncited documents20131138
Uncited documents20141256
Uncited documents20151419
Uncited documents20161540
Cited documents19997880
Cited documents20007840
Cited documents20017874
Cited documents20027809
Cited documents20038084
Cited documents20048340
Cited documents20058809
Cited documents20069070
Cited documents20079660
Cited documents200810102
Cited documents200910436
Cited documents201010987
Cited documents201111384
Cited documents201211520
Cited documents201311585
Cited documents201411798
Cited documents201511796
Cited documents201611342
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