| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 3 |
0.6%
|
|
| 2001 | 6 |
1.3%
|
|
| 2002 | 4 |
0.9%
|
|
| 2003 | 3 |
0.6%
|
|
| 2004 | 7 |
1.5%
|
|
| 2005 | 13 |
2.8%
|
|
| 2006 | 10 |
2.2%
|
|
| 2007 | 11 |
2.4%
|
|
| 2008 | 22 |
4.7%
|
|
| 2009 | 24 |
5.2%
|
|
| 2010 | 58 |
12.5%
|
|
| 2011 | 57 |
12.3%
|
|
| 2012 | 57 |
12.3%
|
|
| 2013 | 70 |
15.1%
|
|
| 2014 | 70 |
15.1%
|
|
| 2015 | 50 |
10.8%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 6016 |