| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 1 |
0.1%
|
|
| 1993 | 2 |
0.3%
|
|
| 1994 | 1 |
0.1%
|
|
| 1995 | 3 |
0.4%
|
|
| 1996 | 4 |
0.5%
|
|
| 1997 | 5 |
0.6%
|
|
| 1998 | 17 |
2.2%
|
|
| 1999 | 14 |
1.8%
|
|
| 2000 | 31 |
4%
|
|
| 2001 | 34 |
4.4%
|
|
| 2002 | 47 |
6%
|
|
| 2003 | 67 |
8.6%
|
|
| 2004 | 57 |
7.3%
|
|
| 2005 | 75 |
9.6%
|
|
| 2006 | 84 |
10.8%
|
|
| 2007 | 105 |
13.5%
|
|
| 2008 | 166 |
21.3%
|
|
| 2009 | 66 |
8.5%
|
|
| Sysmiss | 50529 |