| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 1085 |
8.2%
|
|
| 2006 | 2560 |
19.3%
|
|
| 2007 | 3004 |
22.6%
|
|
| 2008 | 2912 |
21.9%
|
|
| 2009 | 3081 |
23.2%
|
|
| 2010 | 635 |
4.8%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9999 | Missing | 5 |
0%
|
| Sysmiss | 305 |