| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 43 |
7.8%
|
|
| 2003 | 67 |
12.2%
|
|
| 2004 | 160 |
29.1%
|
|
| 2005 | 279 |
50.8%
|
|
| Sysmiss | 1811 |