| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.3%
|
|
| 2001 | 3 |
1%
|
|
| 2002 | 59 |
19.8%
|
|
| 2003 | 112 |
37.6%
|
|
| 2004 | 93 |
31.2%
|
|
| 2005 | 30 |
10.1%
|
|
| Sysmiss | 6472 |