| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 1 |
10%
|
|
| 1987 | 1 |
10%
|
|
| 1992 | 1 |
10%
|
|
| 1993 | 2 |
20%
|
|
| 1997 | 1 |
10%
|
|
| 1998 | 1 |
10%
|
|
| 1999 | 1 |
10%
|
|
| 2000 | 1 |
10%
|
|
| 2002 | 1 |
10%
|
|
| Sysmiss | 2145 |