| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.2%
|
|
| 1962 | 1 |
0.2%
|
|
| 1963 | 1 |
0.2%
|
|
| 1967 | 1 |
0.2%
|
|
| 1970 | 4 |
0.6%
|
|
| 1972 | 1 |
0.2%
|
|
| 1973 | 1 |
0.2%
|
|
| 1974 | 1 |
0.2%
|
|
| 1975 | 1 |
0.2%
|
|
| 1977 | 1 |
0.2%
|
|
| 1978 | 3 |
0.5%
|
|
| 1980 | 1 |
0.2%
|
|
| 1982 | 2 |
0.3%
|
|
| 1983 | 4 |
0.6%
|
|
| 1984 | 1 |
0.2%
|
|
| 1985 | 4 |
0.6%
|
|
| 1988 | 1 |
0.2%
|
|
| 1989 | 5 |
0.8%
|
|
| 1990 | 4 |
0.6%
|
|
| 1991 | 2 |
0.3%
|
|
| 1992 | 5 |
0.8%
|
|
| 1993 | 4 |
0.6%
|
|
| 1994 | 1 |
0.2%
|
|
| 1995 | 4 |
0.6%
|
|
| 1996 | 8 |
1.2%
|
|
| 1997 | 5 |
0.8%
|
|
| 1998 | 10 |
1.6%
|
|
| 1999 | 11 |
1.7%
|
|
| 2000 | 15 |
2.3%
|
|
| 2001 | 10 |
1.6%
|
|
| 2002 | 14 |
2.2%
|
|
| 2003 | 18 |
2.8%
|
|
| 2004 | 27 |
4.2%
|
|
| 2005 | 31 |
4.8%
|
|
| 2006 | 39 |
6.1%
|
|
| 2007 | 60 |
9.3%
|
|
| 2008 | 70 |
10.9%
|
|
| 2009 | 108 |
16.8%
|
|
| 2010 | 88 |
13.7%
|
|
| 2011 | 1 |
0.2%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 41 |
6.4%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 34 |
5.3%
|
| Sysmiss | 21230 |