| Value | Category | Cases | |
|---|---|---|---|
| 1953 | 1 |
0.2%
|
|
| 1960 | 1 |
0.2%
|
|
| 1973 | 1 |
0.2%
|
|
| 1974 | 1 |
0.2%
|
|
| 1976 | 1 |
0.2%
|
|
| 1978 | 1 |
0.2%
|
|
| 1980 | 4 |
0.6%
|
|
| 1981 | 2 |
0.3%
|
|
| 1983 | 1 |
0.2%
|
|
| 1984 | 1 |
0.2%
|
|
| 1985 | 4 |
0.6%
|
|
| 1986 | 4 |
0.6%
|
|
| 1987 | 1 |
0.2%
|
|
| 1988 | 3 |
0.5%
|
|
| 1989 | 3 |
0.5%
|
|
| 1990 | 6 |
0.9%
|
|
| 1991 | 4 |
0.6%
|
|
| 1992 | 4 |
0.6%
|
|
| 1993 | 5 |
0.8%
|
|
| 1994 | 6 |
0.9%
|
|
| 1995 | 7 |
1.1%
|
|
| 1996 | 11 |
1.7%
|
|
| 1997 | 10 |
1.5%
|
|
| 1998 | 19 |
2.9%
|
|
| 1999 | 19 |
2.9%
|
|
| 2000 | 30 |
4.6%
|
|
| 2001 | 21 |
3.2%
|
|
| 2002 | 25 |
3.8%
|
|
| 2003 | 21 |
3.2%
|
|
| 2004 | 38 |
5.8%
|
|
| 2005 | 37 |
5.7%
|
|
| 2006 | 42 |
6.4%
|
|
| 2007 | 44 |
6.7%
|
|
| 2008 | 50 |
7.6%
|
|
| 2009 | 65 |
9.9%
|
|
| 2010 | 63 |
9.6%
|
|
| 2011 | 1 |
0.2%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 40 |
6.1%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 9 |
1.4%
|
| 9999 | Don't know | 48 |
7.3%
|
| Sysmiss | 21220 |