| Value | Category | Cases | |
|---|---|---|---|
| 1953 | 1 |
0.3%
|
|
| 1965 | 1 |
0.3%
|
|
| 1967 | 1 |
0.3%
|
|
| 1968 | 1 |
0.3%
|
|
| 1971 | 1 |
0.3%
|
|
| 1973 | 1 |
0.3%
|
|
| 1978 | 1 |
0.3%
|
|
| 1980 | 2 |
0.6%
|
|
| 1984 | 3 |
0.9%
|
|
| 1985 | 2 |
0.6%
|
|
| 1986 | 3 |
0.9%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 1 |
0.3%
|
|
| 1990 | 3 |
0.9%
|
|
| 1991 | 4 |
1.2%
|
|
| 1992 | 5 |
1.5%
|
|
| 1993 | 2 |
0.6%
|
|
| 1994 | 1 |
0.3%
|
|
| 1995 | 3 |
0.9%
|
|
| 1996 | 3 |
0.9%
|
|
| 1997 | 4 |
1.2%
|
|
| 1998 | 2 |
0.6%
|
|
| 1999 | 3 |
0.9%
|
|
| 2000 | 19 |
5.8%
|
|
| 2001 | 7 |
2.1%
|
|
| 2002 | 8 |
2.5%
|
|
| 2003 | 4 |
1.2%
|
|
| 2004 | 19 |
5.8%
|
|
| 2005 | 15 |
4.6%
|
|
| 2006 | 18 |
5.5%
|
|
| 2007 | 21 |
6.4%
|
|
| 2008 | 21 |
6.4%
|
|
| 2009 | 45 |
13.8%
|
|
| 2010 | 34 |
10.4%
|
|
| 2011 | 1 |
0.3%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 29 |
8.9%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 9 |
2.8%
|
| 9999 | Don't know | 27 |
8.3%
|
| Sysmiss | 21548 |