| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 2 |
0.7%
|
|
| 1997 | 5 |
1.8%
|
|
| 1998 | 5 |
1.8%
|
|
| 1999 | 6 |
2.1%
|
|
| 2000 | 2 |
0.7%
|
|
| 2001 | 10 |
3.5%
|
|
| 2002 | 18 |
6.3%
|
|
| 2003 | 14 |
4.9%
|
|
| 2004 | 33 |
11.6%
|
|
| 2005 | 18 |
6.3%
|
|
| 2006 | 8 |
2.8%
|
|
| 2007 | 19 |
6.7%
|
|
| 2008 | 16 |
5.6%
|
|
| 2009 | 29 |
10.2%
|
|
| 2010 | 10 |
3.5%
|
|
| 2011 | 16 |
5.6%
|
|
| 2012 | 8 |
2.8%
|
|
| 2013 | 13 |
4.6%
|
|
| 2014 | 17 |
6%
|
|
| 2015 | 4 |
1.4%
|
|
| 2016 | 2 |
0.7%
|
|
| Missing value | 30 |
10.5%
|