| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.9%
|
|
| 2001 | 1 |
0.9%
|
|
| 2002 | 8 |
7.4%
|
|
| 2003 | 23 |
21.3%
|
|
| 2004 | 16 |
14.8%
|
|
| 2005 | 19 |
17.6%
|
|
| 2006 | 16 |
14.8%
|
|
| 2007 | 21 |
19.4%
|
|
| 9898 | 1 |
0.9%
|
|
| 9998 | 2 |
1.9%
|