| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 3 |
4.1%
|
|
| 2004 | 1 |
1.4%
|
|
| 2005 | 2 |
2.7%
|
|
| 2006 | 2 |
2.7%
|
|
| 2007 | 3 |
4.1%
|
|
| 2008 | 3 |
4.1%
|
|
| 2009 | 6 |
8.2%
|
|
| 2010 | 6 |
8.2%
|
|
| 2011 | 9 |
12.3%
|
|
| 2012 | 8 |
11%
|
|
| 2013 | 10 |
13.7%
|
|
| 2014 | 9 |
12.3%
|
|
| 2015 | 11 |
15.1%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 6408 |