| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 9 |
0.3%
|
|
| 2001 | 105 |
3.3%
|
|
| 2002 | 489 |
15.5%
|
|
| 2003 | 444 |
14%
|
|
| 2004 | 517 |
16.3%
|
|
| 2005 | 496 |
15.7%
|
|
| 2006 | 553 |
17.5%
|
|
| 2007 | 482 |
15.2%
|
|
| 9999 | no answer | 70 |
2.2%
|
| Sysmiss | 534 |