| Country | Count | Mean |
|---|---|---|
| United States | 51 | 7.37 |
| Australia | 33 | 7.97 |
| United Kingdom | 23 | 8.53 |
| Canada | 7 | 8.96 |
| Indonesia | 3 | 8.67 |
| Israel | 2 | 7.90 |
| Sweden | 2 | 8.00 |
| Thailand | 1 | 7.20 |
| Argentina | 1 | 8.00 |
| Brazil | 1 | 7.20 |
| Austria | 1 | 6.00 |
| Portugal | 1 | 7.00 |
| Bolivia | 1 | 8.00 |
| France | 1 | 8.80 |
| Germany | 1 | 10.00 |
| Bulgaria | 1 | 10.00 |
| Denmark | 1 | 10.00 |
| Chile | 1 | 8.50 |
| Ireland | 1 | 8.20 |
| Mexico | 1 | 8.00 |