| Country/Region | Number of papers | Total number of citations | Citation per paper |
| England | 11,801 | 224,415 | 19.02 | France | 8,670 | 152,380 | 17.58 | Germany | 7,404 | 130,028 | 17.56 | Italy | 6,758 | 116,354 | 17.22 | Spain | 6,147 | 98,771 | 16.07 | Netherlands | 5,813 | 110,473 | 19.00 | Turkey | 3,645 | 76,701 | 21.04 | Belgium | 2,836 | 70,460 | 24.84 | Greece | 2,036 | 36,737 | 18.04 | Sweden | 1,865 | 32,884 | 17.63 | Poland | 1,771 | 26,101 | 14.74 | Portugal | 1,768 | 31,532 | 17.83 | Austria | 1,544 | 26,113 | 16.91 | Switzerland | 1,481 | 32,200 | 21.74 | Norway | 1,472 | 27,610 | 18.76 | Finland | 1,462 | 28,393 | 19.42 |
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