|
| 2009 | 2011 | 2013 | |||
| Sent | Returned | Sent | Returned | Sent | Returned | |
| n | n (%) | n | n (%) | n | n (%) | |
| Medical | 999 | 439 (44) | 1008 | 540 (54) | 1139 | 658 (58) |
| Surgical | 821 | 409 (50) | 873 | 523 (60) | 1164 | 641 (55) |
| Mixed medical-surgical | 300 | 175 (62) | 291 | 165 (57) | 258 | 171 (66) |
| Total | 2120 | 1023 (48) | 2172 | 1228 (57) | 2561 | 1470 (57) |