| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 1 |
2.8%
|
|
| 1979 | 1 |
2.8%
|
|
| 1980 | 1 |
2.8%
|
|
| 1985 | 1 |
2.8%
|
|
| 1989 | 2 |
5.6%
|
|
| 1990 | 2 |
5.6%
|
|
| 1991 | 2 |
5.6%
|
|
| 1992 | 4 |
11.1%
|
|
| 1993 | 1 |
2.8%
|
|
| 1997 | 2 |
5.6%
|
|
| 2000 | 2 |
5.6%
|
|
| 2001 | 3 |
8.3%
|
|
| 2002 | 3 |
8.3%
|
|
| 2003 | 7 |
19.4%
|
|
| 7777 | NZ | 4 |
11.1%
|
| 8888 | BO | 0 |
0%
|
| Sysmiss | 9693 |