| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
0.2%
|
|
| 2005 | 165 |
28.3%
|
|
| 2006 | 4 |
0.7%
|
|
| 2007 | 36 |
6.2%
|
|
| 2008 | 27 |
4.6%
|
|
| 2009 | 1 |
0.2%
|
|
| 2012 | 161 |
27.6%
|
|
| 2013 | 100 |
17.2%
|
|
| 2016 | 1 |
0.2%
|
|
| 2017 | 1 |
0.2%
|
|
| Missing value | 86 |
14.8%
|