| Country | Count | Mean |
|---|---|---|
| United States | 68 | 8.80 |
| United Kingdom | 50 | 9.01 |
| Australia | 35 | 7.89 |
| Canada | 9 | 7.19 |
| Germany | 7 | 7.14 |
| Sweden | 5 | 8.50 |
| Finland | 3 | 8.53 |
| France | 3 | 7.83 |
| Norway | 2 | 7.30 |
| Belgium | 2 | 8.40 |
| Italy | 2 | 9.65 |
| Austria | 1 | 7.00 |
| Hungary | 1 | 10.00 |
| Bulgaria | 1 | 10.00 |
| Netherlands | 1 | 9.70 |
| Estonia | 1 | 9.00 |