| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 135 |
7.1%
|
|
| 1996 | 444 |
23.5%
|
|
| 1997 | 354 |
18.7%
|
|
| 1998 | 352 |
18.6%
|
|
| 1999 | 386 |
20.4%
|
|
| 2000 | 219 |
11.6%
|
|
| 9997 | Missing | 0 |
0%
|
| 9999 | DK | 0 |
0%
|