| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 1 |
0.6%
|
|
| 2000 | 1 |
0.6%
|
|
| 2001 | 3 |
1.7%
|
|
| 2002 | 1 |
0.6%
|
|
| 2003 | 10 |
5.5%
|
|
| 2004 | 3 |
1.7%
|
|
| 2005 | 1 |
0.6%
|
|
| 2006 | 3 |
1.7%
|
|
| 2007 | 2 |
1.1%
|
|
| 2008 | 10 |
5.5%
|
|
| 2009 | 4 |
2.2%
|
|
| 2010 | 18 |
9.9%
|
|
| 2011 | 19 |
10.5%
|
|
| 2012 | 91 |
50.3%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 14 |
7.7%
|
| Sysmiss | 12035 |