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Most cited countries/regions.
| Countries/Regions | Number of Contributions | Percentage |
|---|---|---|
| United States | 141 | 29.3% |
| United Kingdom | 54 | 11.2% |
| Australia | 48 | 10.0% |
| Germany | 45 | 9.4% |
| China | 29 | 6.0% |
| Canada | 29 | 6.0% |
| Netherlands | 19 | 4.0% |
| India | 18 | 3.7% |
| Italy | 17 | 3.5% |
| South Korea | 15 | 3.1% |
| Spain | 14 | 2.9% |
| Singapore | 13 | 2.7% |
| Sweden | 9 | 1.9% |
| Taiwan | 9 | 1.9% |
| Belgium | 9 | 1.9% |
| Austria | 8 | 1.7% |
| Portugal | 8 | 1.7% |
| Greece | 8 | 1.7% |
| France | 7 | 1.5% |
| Denmark | 7 | 1.5% |
| New Zealand | 7 | 1.5% |
| Switzerland | 7 | 1.5% |
| Brazil | 7 | 1.5% |
| Norway | 6 | 1.2% |
