| Procedure | 2010 | 2011 | 2012 | 2013 | 2014 |
| MA | --- | 5.6 | 21.1 | 28.9 | 36.9 |
| Other medical | 1.0 | 1.2 | 0.8 | 1.3 | 0.9 |
| Surgical | 96.3 | 82.0 | 69.9 | 62.0 | 54.7 |
| Other | 2.7 | 11.3 | 8.2 | 7.8 | 7.4 |
| Total | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |