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UNESCO SCIENCE REPORT

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<strong>UNESCO</strong> Figure 5.11: <strong>SCIENCE</strong> Scientific <strong>REPORT</strong> publication trends in the USA, 2005–2014<br />

The USA has maintained its share of publications among high-income economies<br />

350 000<br />

40<br />

Volume of US publications (left axis)<br />

USA’s % share among high-income economies (right axis)<br />

325 000<br />

36.4<br />

USA’s % share of world total (right axis)<br />

321 846<br />

35.4<br />

35<br />

300 000<br />

30.6<br />

30<br />

275 000<br />

267 521<br />

250 000<br />

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014<br />

25.3<br />

25<br />

1.32<br />

Average citation rate for US<br />

publications, 2008–2012;<br />

the OECD average is 1.08<br />

14.7%<br />

Share of US papers among 10%<br />

most cited papers, 2008–2012;<br />

the OECD average is 11.1%<br />

34.8%<br />

Share of US papers with<br />

foreign co-authors, 2008–2014;<br />

the OECD average is 29.4%<br />

US scientists publish most in medical and biological sciences<br />

Cumulative totals by field, 2008–2014<br />

630 977<br />

47%<br />

Share of scientific<br />

publications on<br />

astronomy worldwide<br />

originating in the USA<br />

488 258<br />

150 800<br />

158 991<br />

130 233<br />

175 444<br />

35 671 35 235<br />

39 547<br />

8 451<br />

28 411<br />

23 398 18 260<br />

Agriculture<br />

Astronomy<br />

Biological sciences<br />

Chemistry<br />

Computer science<br />

Engineering<br />

Geosciences<br />

Mathematics<br />

Medical sciences<br />

Other life sciences<br />

Physics<br />

Psychology<br />

Social sciences<br />

Note: The totals exclude 175 543 unclassified articles.<br />

The USA’s main partner is China, followed closely by the UK, Germany and Canada<br />

Main foreign partners, 2008–2014 (number of papers)<br />

1st collaborator 2nd collaborator 3rd collaborator 4th collaborator 5th collaborator<br />

USA China (119 594) UK (100 537) Germany (94 322) Canada (85 069) France (62 636)<br />

Source: Thomson Reuters’ Web of Science, Science Citation Index Expanded; data treatment by Science–Metrix<br />

150

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