Table 3.
Top 15 most productive countries
| Rank | Country | TP (%) | IP (R) | CP (R) | FP (R) | RP (R) | CPP2019 |
|---|---|---|---|---|---|---|---|
| 1 | USA | 207 (30.7%) | 134 (1) | 73 (1) | 159 (1) | 165 (1) | 53.7 |
| 2 | China | 104 (15.4%) | 82 (2) | 22 (5) | 98 (2) | 97 (2) | 12.2 |
| 3 | United Kingdom | 75 (11.1%) | 32 (5) | 43 (2) | 51 (4) | 53 (4) | 44.5 |
| 4 | Japan | 72 (10.7%) | 57 (3) | 15 (9) | 60 (3) | 60 (3) | 20.3 |
| 5 | Germany | 64 (9.5%) | 32 (5) | 32 (3) | 42 (6) | 40 (6) | 50.6 |
| 6 | Spain | 52 (7.7%) | 38 (4) | 14 (10) | 48 (5) | 47 (5) | 70.7 |
| Italy | 52 (7.7%) | 26 (7) | 26 (4) | 39 (7) | 39 (7) | 39.2 | |
| 8 | South Korea | 29 (4.3%) | 24 (8) | 5 (14) | 29 (8) | 29 (8) | 20.0 |
| 9 | Netherlands | 28 (4.2%) | 12 (9) | 16 (8) | 20 (9) | 21 (9) | 61.3 |
| France | 28 (4.2%) | 8 (13) | 20 (6) | 15 (10) | 14 (10) | 35.9 | |
| Canada | 28 (4.2%) | 9 (11) | 19 (7) | 13 (11) | 14 (10) | 28.0 | |
| 12 | Australia | 15 (2.2%) | 9 (11) | 6 (13) | 9 (13) | 9 (13) | 26.3 |
| 13 | Switzerland | 14 (2.1%) | 2 (15) | 12 (11) | 5 (15) | 5 (15) | 32.1 |
| 14 | Belgium | 13 (1.9%) | 5 (14) | 8 (12) | 6 (14) | 6 (14) | 42.5 |
| Russia | 13 (1.9%) | 12 (9) | 1 (15) | 12 (12) | 12 (12) | 5.4 |
TP: sum of group of publications; IP: independent publication; CP: collaborative publication; FP: first-author publication; RP: reprint-author publication; R: rank; TC2019: number of times each publication cited since its publication to 2019; CPP2019: ratio of TC2019 to TP.