| 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | Total number of articles for the whole period | Percentage of worldwide production (articles) | Mean impact factor of all articles | Total product for the whole period * | Total product/gross domestic product †| Total product/millions of population |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
USA | 840 | 919 | 852 | 1,021 | 950 | 1,196 | 1,252 | 1,195 | 1,307 | 9,532 | 60.6 | 1.7 | 16,254 | 21.2 | 57.9 |
Canada | 33 | 43 | 50 | 44 | 58 | 45 | 46 | 47 | 71 | 437 | 2.8 | 1.4 | 629 | 10.4 | 20.7 |
Western Europe | 353 | 367 | 367 | 400 | 395 | 518 | 611 | 505 | 618 | 4,134 | 26.3 | 1.1 | 4,651 | 5.2 | 12.0 |
Japan | 6 | 7 | 11 | 11 | 19 | 9 | 12 | 14 | 14 | 103 | 0.7 | 1.2 | 126 | 0.2 | 1.0 |
Oceania | 28 | 28 | 30 | 37 | 42 | 57 | 36 | 61 | 111 | 430 | 2.7 | 1.7 | 711 | 15.2 | 23.5 |
Asia | 31 | 40 | 34 | 52 | 62 | 63 | 85 | 91 | 91 | 549 | 3.5 | 1.4 | 753 | 2.3 | 0.2 |
Eastern Europe | 3 | 5 | 3 | 10 | 6 | 15 | 15 | 21 | 24 | 102 | 0.7 | 1.2 | 125 | 1.3 | 0.3 |
Central and Latin America | 11 | 16 | 10 | 15 | 19 | 18 | 23 | 17 | 34 | 163 | 1.0 | 1.6 | 265 | 1.6 | 0.5 |
Africa | 17 | 21 | 22 | 22 | 27 | 24 | 52 | 38 | 55 | 278 | 1.8 | 1.6 | 457 | 9.3 | 0.6 |
TOTAL (or average) | 1,322 | 1,446 | 1,379 | 1,612 | 1,578 | 1,945 | 2,132 | 1,989 | 2,325 | 15,728 | - | - | - | (8.2) | - |