| Country | Count | Mean |
|---|---|---|
| Austria | 33 | 9.84 |
| United States | 20 | 8.76 |
| Australia | 11 | 8.02 |
| Canada | 6 | 9.07 |
| United Kingdom | 5 | 5.40 |
| Germany | 2 | 7.50 |
| Portugal | 1 | 8.00 |
| Sweden | 1 | 7.00 |
| Switzerland | 1 | 5.50 |
| Finland | 1 | 9.00 |
| Netherlands | 1 | 9.60 |
| Malaysia | 1 | 9.20 |
| Greece | 1 | 9.00 |
| Turkey | 1 | 8.00 |