| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 1 |
0.4%
|
|
| 1986 | 1 |
0.4%
|
|
| 1988 | 1 |
0.4%
|
|
| 1990 | 2 |
0.9%
|
|
| 1992 | 2 |
0.9%
|
|
| 1993 | 3 |
1.3%
|
|
| 1994 | 1 |
0.4%
|
|
| 1995 | 4 |
1.7%
|
|
| 1996 | 1 |
0.4%
|
|
| 1998 | 9 |
3.9%
|
|
| 1999 | 2 |
0.9%
|
|
| 2000 | 33 |
14.2%
|
|
| 2001 | 2 |
0.9%
|
|
| 2002 | 5 |
2.1%
|
|
| 2003 | 16 |
6.9%
|
|
| 2004 | 15 |
6.4%
|
|
| 2005 | 38 |
16.3%
|
|
| 2006 | 28 |
12%
|
|
| 2007 | 23 |
9.9%
|
|
| 2008 | 37 |
15.9%
|
|
| 9999 | 9 |
3.9%
|
|
| Sysmiss | 213 |