| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 3 |
4%
|
|
| 1992 | 1 |
1.3%
|
|
| 1995 | 1 |
1.3%
|
|
| 1997 | 1 |
1.3%
|
|
| 1998 | 2 |
2.7%
|
|
| 1999 | 1 |
1.3%
|
|
| 2000 | 5 |
6.7%
|
|
| 2002 | 3 |
4%
|
|
| 2003 | 1 |
1.3%
|
|
| 2004 | 1 |
1.3%
|
|
| 2005 | 4 |
5.3%
|
|
| 2006 | 2 |
2.7%
|
|
| 2007 | 6 |
8%
|
|
| 2008 | 10 |
13.3%
|
|
| 2009 | 12 |
16%
|
|
| 2010 | 12 |
16%
|
|
| 2011 | 1 |
1.3%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 6 |
8%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 3 |
4%
|
| Sysmiss | 21799 |