| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 1 |
0.3%
|
|
| 2003 | 64 |
18.8%
|
|
| 2004 | 87 |
25.6%
|
|
| 2005 | 5 |
1.5%
|
|
| 2006 | 4 |
1.2%
|
|
| 2008 | 5 |
1.5%
|
|
| 2009 | 1 |
0.3%
|
|
| 2012 | 1 |
0.3%
|
|
| 2013 | 1 |
0.3%
|
|
| 2014 | 1 |
0.3%
|
|
| Missing value | 170 |
50%
|