| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 66 |
0.9%
|
|
| 2005 | 552 |
7.4%
|
|
| 2006 | 677 |
9%
|
|
| 2007 | 713 |
9.5%
|
|
| 2008 | 767 |
10.2%
|
|
| 2009 | 264 |
3.5%
|
|
| 9998 | dk | 12 |
0.2%
|
| 9999 | missing | 1712 |
22.8%
|
| Sysmiss | 2736 |
36.5%
|