| Table 5-28 |
| Share of world citations of S&E articles, by major region/country: 1995, 2000, and 2005 |
| (Percent) |
| |
| Region/country |
|
1995 |
|
2000 |
|
2005 |
| |
| United States |
|
49.6 |
|
44.8 |
|
40.8 |
| European Union |
|
30.6 |
|
33.3 |
|
33.7 |
| Other Western Europe |
|
2.3 |
|
2.5 |
|
2.5 |
| Asia-10 |
|
8.2 |
|
9.8 |
|
12.9 |
| Other Asia |
|
0.0 |
|
0.0 |
|
0.1 |
| Other former USSR |
|
1.0 |
|
1.0 |
|
0.8 |
| Near East/North Africa |
|
1.0 |
|
1.1 |
|
1.2 |
| Central/South America |
|
0.7 |
|
1.0 |
|
1.5 |
| Sub-Saharan Africa |
|
0.3 |
|
0.3 |
|
0.3 |
| Other |
|
6.3 |
|
6.3 |
|
6.1 |
| |
USSR = Union of Soviet Socialist Republics
NOTES: Article counts from set of journals covered by Science Citation Index (SCI) and Social Sciences Citation Index (SSCI). Articles classified by year they entered database, rather than year of publication, and assigned to region/country/economy on basis of institutional address(es) listed on article. Articles on fractional-count basis, i.e., for articles with collaborating institutions from multiple countries/economies, each country/economy receives fractional credit on basis of proportion of its participating institutions. Citation counts based on 3-year period with 2-year lag, e.g., citations for 1995 are references made in articles in 1995 data tape to articles in 1991–93 data tapes. See appendix table 5-33 for countries/economies included in each region.
SOURCES: Thomson Scientific, SCI and SSCI, http://scientific.thomson.com/products/categories/citation/; ipIQ, Inc.; and National Science Foundation, Division of Science Resources Statistics, special tabulations. Science and Engineering Indicators 2008 |
|
Source Data