Field safety notices by year and Conformité Européenne (CE) class of device
| Year | No of field safety notices | CE Class 3 (%) | CE Class 2 (%) | CE Class 1 (%) |
| 2006 | 62 | 6 (9.7) | 47 (75.8) | 9 (14.5) |
| 2007 | 164 | 27 (16.5) | 113 (68.9) | 24 (14.6) |
| 2008 | 513 | 81 (15.8) | 362 (70.6) | 70 (13.6) |
| 2009 | 628 | 92 (14.6) | 466 (74.2) | 70 (11.1) |
| 2010 | 757 | 121 (16.0) | 539 (71.2) | 97 (12.8) |
| Total | 2124 | 327 (15.4) | 1527 (71.9) | 270 (12.7) |