| Country | Count | Mean |
|---|---|---|
| Austria | 50 | 8.79 |
| United States | 20 | 9.28 |
| Australia | 17 | 8.72 |
| United Kingdom | 13 | 7.15 |
| Germany | 2 | 7.50 |
| Italy | 1 | 8.00 |
| Sweden | 1 | 7.50 |
| Norway | 1 | 6.00 |
| France | 1 | 8.00 |
| Portugal | 1 | 7.80 |
| Finland | 1 | 9.00 |
| Netherlands | 1 | 10.00 |
| Switzerland | 1 | 10.00 |
| Greece | 1 | 9.00 |
| Canada | 1 | 8.20 |