| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 6 |
2.8%
|
|
| 1995 | 2 |
0.9%
|
|
| 1996 | 4 |
1.9%
|
|
| 1997 | 14 |
6.6%
|
|
| 1998 | 45 |
21.1%
|
|
| 1999 | 83 |
39%
|
|
| 2000 | 59 |
27.7%
|
|
| Sysmiss | 12023 |