| Country | Count | Mean |
|---|---|---|
| Austria | 81 | 9.74 |
| United States | 33 | 8.92 |
| United Kingdom | 18 | 8.17 |
| Australia | 14 | 8.33 |
| Canada | 7 | 8.77 |
| Netherlands | 3 | 8.67 |
| Germany | 3 | 9.00 |
| Italy | 2 | 8.30 |
| Greece | 2 | 8.75 |
| France | 2 | 9.50 |
| Norway | 1 | 8.80 |
| Brazil | 1 | 7.00 |
| Sweden | 1 | 8.00 |
| Japan | 1 | 9.00 |
| Finland | 1 | 9.00 |
| Denmark | 1 | 9.00 |
| Romania | 1 | 10.00 |