| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 11 |
5.5%
|
|
| 2001 | 6 |
3%
|
|
| 2002 | 14 |
7%
|
|
| 2003 | 8 |
4%
|
|
| 2004 | 2 |
1%
|
|
| 2006 | 3 |
1.5%
|
|
| 2007 | 6 |
3%
|
|
| 2008 | 2 |
1%
|
|
| 2009 | 2 |
1%
|
|
| 2011 | 4 |
2%
|
|
| 2012 | 4 |
2%
|
|
| 2013 | 14 |
7%
|
|
| 2014 | 7 |
3.5%
|
|
| 2015 | 14 |
7%
|
|
| 2016 | 13 |
6.5%
|
|
| 2017 | 9 |
4.5%
|
|
| Missing value | 80 |
40.2%
|