| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 111 |
11.1%
|
|
| 2003 | 28 |
2.8%
|
|
| 2004 | 66 |
6.6%
|
|
| 2005 | 157 |
15.7%
|
|
| 2006 | 628 |
62.9%
|
|
| 2007 | 9 |
0.9%
|