| Country | Count | Mean |
|---|---|---|
| United States | 43 | 8.41 |
| United Kingdom | 30 | 8.45 |
| Australia | 17 | 7.43 |
| Germany | 4 | 7.50 |
| Sweden | 2 | 10.00 |
| Canada | 2 | 9.00 |
| Indonesia | 2 | 8.50 |
| Finland | 1 | 8.00 |
| Japan | 1 | 6.00 |
| Portugal | 1 | 5.80 |
| Belgium | 1 | 5.00 |
| Italy | 1 | 8.30 |
| Virgin Islands | 1 | 10.00 |
| Poland | 1 | 10.00 |
| Netherlands | 1 | 9.50 |
| Austria | 1 | 9.00 |
| Hungary | 1 | 9.00 |
| Israel | 1 | 9.00 |