| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 2 |
3.9%
|
|
| 2001 | 6 |
11.8%
|
|
| 2002 | 5 |
9.8%
|
|
| 2003 | 21 |
41.2%
|
|
| 2004 | 17 |
33.3%
|
|
| Sysmiss | 1580 |