| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 1 |
0.6%
|
|
| 1990 | 1 |
0.6%
|
|
| 1991 | 1 |
0.6%
|
|
| 1992 | 3 |
1.7%
|
|
| 1993 | 1 |
0.6%
|
|
| 1998 | 1 |
0.6%
|
|
| 1999 | 1 |
0.6%
|
|
| 2000 | 2 |
1.1%
|
|
| 2001 | 52 |
29.1%
|
|
| 2002 | 108 |
60.3%
|
|
| 7777 | NZ | 5 |
2.8%
|
| 8888 | BO | 3 |
1.7%
|
| Sysmiss | 9705 |