| Value | Category | Cases | |
|---|---|---|---|
| 1962 | 1 |
7.1%
|
|
| 1980 | 1 |
7.1%
|
|
| 1987 | 1 |
7.1%
|
|
| 1996 | 1 |
7.1%
|
|
| 1997 | 1 |
7.1%
|
|
| 1998 | 2 |
14.3%
|
|
| 1999 | 1 |
7.1%
|
|
| 2000 | 1 |
7.1%
|
|
| 2001 | 3 |
21.4%
|
|
| 2002 | 1 |
7.1%
|
|
| 2003 | 1 |
7.1%
|
|
| 9999 | 9999. Don't know | 0 |
0%
|
| Sysmiss | 985 |