| Value | Category | Cases | |
|---|---|---|---|
| 1998 | 4 |
0.6%
|
|
| 1999 | 3 |
0.5%
|
|
| 2000 | 19 |
3%
|
|
| 2001 | 11 |
1.7%
|
|
| 2002 | 13 |
2.1%
|
|
| 2003 | 18 |
2.9%
|
|
| 2004 | 12 |
1.9%
|
|
| 2005 | 19 |
3%
|
|
| 2006 | 21 |
3.3%
|
|
| 2007 | 15 |
2.4%
|
|
| 2008 | 51 |
8.1%
|
|
| 2009 | 83 |
13.2%
|
|
| 2010 | 82 |
13%
|
|
| 2011 | 159 |
25.2%
|
|
| 2012 | 115 |
18.3%
|
|
| 3333 | Missing | 1 |
0.2%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 4 |
0.6%
|
| Sysmiss | 11586 |