| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 1 |
0.6%
|
|
| 2000 | 2 |
1.2%
|
|
| 2001 | 2 |
1.2%
|
|
| 2003 | 1 |
0.6%
|
|
| 2004 | 1 |
0.6%
|
|
| 2005 | 2 |
1.2%
|
|
| 2006 | 3 |
1.9%
|
|
| 2007 | 2 |
1.2%
|
|
| 2008 | 10 |
6.2%
|
|
| 2009 | 5 |
3.1%
|
|
| 2010 | 21 |
13%
|
|
| 2011 | 19 |
11.8%
|
|
| 2012 | 23 |
14.3%
|
|
| 2013 | 27 |
16.8%
|
|
| 2014 | 34 |
21.1%
|
|
| 2015 | 8 |
5%
|
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 11598 |