| Country | Number |
| United States | 49.8 |
| Saudi Arabia | 12.2 |
| Germany | 12.2 |
| Russia | 11.7 |
| United Kingdom | 8.8 |
| United Arab Emirates | 8.3 |
| France | 7.9 |
| Canada | 7.9 |
| Australia | 7.0 |
| Spain | 5.9 |
| Italy | 5.9 |
| India | 5.2 |
| Ukraine | 5.0 |
| Turkey | 4.9 |
| South Africa | 4.0 |
| Kazakhstan | 3.6 |
| Thailand | 3.6 |
| Pakistan | 3.4 |
| Jordan | 3.2 |
| Kuwait | 3.1 |
| Total | 173.6 |
| % of all | 67.3 |