| 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| United Kingdom | 2 | 10 | 19 | 4 | 5 | 4 | 7 | 2 | 9 | 3 | |||||
| China | 1,658 | 1,324 | 1,144 | 1,210 | 930 | 823 | 678 | 672 | 634 | 521 | 464 | 406 | 374 | 302 | 315 |
| United States of America | 169 | 173 | 168 | 188 | 175 | 178 | 168 | 197 | 185 | 216 | 159 | 136 | 369 | ||
| France | 12 | 9 | 10 | 7 | 12 | 18 | 6 | ||||||||
| Russian Federation | 0 | 0 | 3 | 6 | 1 |