| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 1 |
2%
|
|
| 1981 | 1 |
2%
|
|
| 1982 | 1 |
2%
|
|
| 1986 | 2 |
3.9%
|
|
| 1987 | 2 |
3.9%
|
|
| 1988 | 1 |
2%
|
|
| 1989 | 2 |
3.9%
|
|
| 1991 | 6 |
11.8%
|
|
| 1992 | 8 |
15.7%
|
|
| 1994 | 1 |
2%
|
|
| 1996 | 3 |
5.9%
|
|
| 1998 | 1 |
2%
|
|
| 1999 | 2 |
3.9%
|
|
| 2000 | 7 |
13.7%
|
|
| 2001 | 6 |
11.8%
|
|
| 2002 | 6 |
11.8%
|
|
| 7777 | NZ | 1 |
2%
|
| 8888 | BO | 0 |
0%
|
| Sysmiss | 7479 |