| Country | Count | Mean |
|---|---|---|
| Austria | 75 | 9.13 |
| United States | 51 | 8.21 |
| Australia | 26 | 8.23 |
| United Kingdom | 21 | 7.79 |
| Canada | 11 | 7.88 |
| Finland | 5 | 7.88 |
| Germany | 5 | 7.62 |
| Netherlands | 4 | 8.68 |
| Italy | 3 | 7.83 |
| Greece | 2 | 9.00 |
| France | 2 | 8.50 |
| Norway | 1 | 8.10 |
| Ecuador | 1 | 8.00 |
| Brazil | 1 | 8.00 |
| Portugal | 1 | 8.00 |
| Bulgaria | 1 | 10.00 |
| Slovenia | 1 | 10.00 |
| Sweden | 1 | 10.00 |
| Denmark | 1 | 9.00 |
| Estonia | 1 | 9.00 |
| Malaysia | 1 | 8.80 |
| Japan | 1 | 8.50 |