| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 4 |
0.1%
|
|
| 1995 | 4 |
0.1%
|
|
| 1996 | 45 |
0.6%
|
|
| 1997 | 75 |
1%
|
|
| 1998 | 128 |
1.8%
|
|
| 1999 | 184 |
2.6%
|
|
| 2000 | 387 |
5.4%
|
|
| 2001 | 326 |
4.6%
|
|
| 2002 | 382 |
5.3%
|
|
| 2003 | 411 |
5.7%
|
|
| 2004 | 469 |
6.6%
|
|
| 2005 | 499 |
7%
|
|
| 2006 | 536 |
7.5%
|
|
| 2007 | 542 |
7.6%
|
|
| 2008 | 666 |
9.3%
|
|
| 2009 | 654 |
9.1%
|
|
| 2010 | 465 |
6.5%
|
|
| 2011 | 19 |
0.3%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 29 |
0.4%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 64 |
0.9%
|
| 9999 | Don't know | 1263 |
17.7%
|
| Sysmiss | 4141 |