| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 2 |
20%
|
|
| 1987 | 1 |
10%
|
|
| 1991 | 1 |
10%
|
|
| 1998 | 1 |
10%
|
|
| 2000 | 1 |
10%
|
|
| 2002 | 1 |
10%
|
|
| 2011 | 1 |
10%
|
|
| 2013 | 1 |
10%
|
|
| 2016 | 1 |
10%
|
|
| Sysmiss | 2628 |