| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 5 |
0.1%
|
|
| 1998 | 77 |
0.9%
|
|
| 1999 | 145 |
1.7%
|
|
| 2000 | 292 |
3.4%
|
|
| 2001 | 295 |
3.5%
|
|
| 2002 | 346 |
4.1%
|
|
| 2003 | 387 |
4.5%
|
|
| 2004 | 447 |
5.2%
|
|
| 2005 | 498 |
5.8%
|
|
| 2006 | 524 |
6.2%
|
|
| 2007 | 493 |
5.8%
|
|
| 2008 | 649 |
7.6%
|
|
| 2009 | 657 |
7.7%
|
|
| 2010 | 678 |
8%
|
|
| 2011 | 786 |
9.2%
|
|
| 2012 | 538 |
6.3%
|
|
| 3333 | Missing | 6 |
0.1%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 1696 |
19.9%
|
| Sysmiss | 3697 |