| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 3 |
1.1%
|
|
| 2000 | 2 |
0.8%
|
|
| 2001 | 7 |
2.6%
|
|
| 2002 | 10 |
3.8%
|
|
| 2003 | 20 |
7.5%
|
|
| 2004 | 27 |
10.2%
|
|
| 2005 | 36 |
13.6%
|
|
| 2006 | 37 |
14%
|
|
| 9999 | 123 |
46.4%
|
|
| Sysmiss | 13633 |