| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.1%
|
|
| 2001 | 1 |
0.1%
|
|
| 2002 | 12 |
0.9%
|
|
| 2003 | 646 |
49.8%
|
|
| 2004 | 605 |
46.6%
|
|
| 2005 | 33 |
2.5%
|
|
| Sysmiss | 33 |