1-20 (of 202 countries)
| # | Country | Articles | Citations | h-index |
|---|---|---|---|---|
| 1 | United States | 10,837,617 | 398.7M | 2,987 |
| 2 | China | 7,665,400 | 168.0M | 1,407 |
| 3 | United Kingdom | 4,233,623 | 141.1M | 2,018 |
| 4 | Germany | 2,976,282 | 99.6M | 1,698 |
| 5 | France | 2,285,597 | 69.8M | 1,498 |
| 6 | Japan | 2,745,836 | 66.7M | 1,322 |
| 7 | Canada | 2,036,084 | 67.3M | 1,537 |
| 8 | Italy | 1,977,366 | 55.1M | 1,282 |
| 9 | Australia | 1,631,660 | 53.6M | 1,356 |
| 10 | Netherlands | 1,181,102 | 45.1M | 1,381 |
| 11 | Spain | 1,425,363 | 40.7M | 1,161 |
| 12 | India | 2,188,308 | 36.9M | 873 |
| 13 | Switzerland | 809,904 | 33.4M | 1,300 |
| 14 | Sweden | 852,173 | 29.7M | 1,163 |
| 15 | Belgium | 597,053 | 20.6M | 1,017 |
| 16 | Brazil | 1,161,993 | 20.1M | 748 |
| 17 | Denmark | 524,111 | 19.3M | 1,000 |
| 18 | South Korea | 816,080 | 19.1M | 777 |
| 19 | Israel | 537,211 | 17.4M | 1,004 |
| 20 | Taiwan | 676,015 | 15.0M | 679 |