| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 12 |
3.9%
|
|
| 2004 | 86 |
27.9%
|
|
| 2005 | 3 |
1%
|
|
| 2006 | 3 |
1%
|
|
| 2007 | 1 |
0.3%
|
|
| 2012 | 1 |
0.3%
|
|
| 2013 | 1 |
0.3%
|
|
| 2014 | 10 |
3.2%
|
|
| Missing value | 191 |
62%
|