| Number of Procedures | Region | ||
| United Kingdom | Rest of Europe | Australasia | |
| 1 – 10 | 25.8% | 75.0% | 25.0% |
| 11 – 20 | 41.9% | 12.5% | 25.0% |
| More than 20 | 32.3% | 12.5% | 50.0% |