| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 1 |
16.7%
|
|
| 1993 | 1 |
16.7%
|
|
| 1994 | 1 |
16.7%
|
|
| 1995 | 1 |
16.7%
|
|
| 2000 | 1 |
16.7%
|
|
| 2002 | 1 |
16.7%
|
|
| Sysmiss | 1791 |