| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
0.3%
|
|
| 2000 | 7 |
2.3%
|
|
| 2001 | 1 |
0.3%
|
|
| 2002 | 5 |
1.6%
|
|
| 2003 | 6 |
1.9%
|
|
| 2004 | 20 |
6.5%
|
|
| 2005 | 59 |
19.1%
|
|
| 2006 | 66 |
21.4%
|
|
| 2007 | 55 |
17.8%
|
|
| 2008 | 84 |
27.2%
|
|
| 9999 | 5 |
1.6%
|
|
| Sysmiss | 137 |