| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 14 |
6.5%
|
|
| 2001 | 94 |
43.5%
|
|
| 2002 | 102 |
47.2%
|
|
| 2003 | 6 |
2.8%
|
|
| Sysmiss | 783 |