| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
0.1%
|
|
| 1995 | 1 |
0.1%
|
|
| 1996 | 1 |
0.1%
|
|
| 1999 | 354 |
19.6%
|
|
| 2000 | 288 |
15.9%
|
|
| 2001 | 398 |
22%
|
|
| 2002 | 332 |
18.4%
|
|
| 2003 | 250 |
13.8%
|
|
| 2004 | 146 |
8.1%
|
|
| 2005 | 36 |
2%
|
|
| Sysmiss | 251 |