| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 2 |
0.3%
|
|
| 2000 | 54 |
7.6%
|
|
| 2001 | 59 |
8.3%
|
|
| 2002 | 112 |
15.8%
|
|
| 2003 | 145 |
20.5%
|
|
| 2004 | 187 |
26.4%
|
|
| 2005 | 137 |
19.3%
|
|
| 2006 | 13 |
1.8%
|
|
| Sysmiss | 7425 |