| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
0.3%
|
|
| 1986 | 1 |
0.2%
|
|
| 1990 | 1 |
0.2%
|
|
| 1995 | 2 |
0.3%
|
|
| 1996 | 5 |
0.8%
|
|
| 1997 | 10 |
1.5%
|
|
| 1998 | 13 |
2%
|
|
| 1999 | 21 |
3.2%
|
|
| 2000 | 55 |
8.4%
|
|
| 2001 | 101 |
15.4%
|
|
| 2002 | 194 |
29.6%
|
|
| 2003 | 250 |
38.2%
|
|
| 9999 | ns | 0 |
0%
|
| Sysmiss | 16532 |