| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.3%
|
|
| 1961 | 1 |
0.3%
|
|
| 1965 | 1 |
0.3%
|
|
| 1970 | 2 |
0.7%
|
|
| 1975 | 1 |
0.3%
|
|
| 1976 | 2 |
0.7%
|
|
| 1977 | 3 |
1%
|
|
| 1978 | 1 |
0.3%
|
|
| 1979 | 1 |
0.3%
|
|
| 1980 | 1 |
0.3%
|
|
| 1981 | 1 |
0.3%
|
|
| 1982 | 1 |
0.3%
|
|
| 1984 | 4 |
1.4%
|
|
| 1985 | 1 |
0.3%
|
|
| 1986 | 4 |
1.4%
|
|
| 1987 | 4 |
1.4%
|
|
| 1988 | 2 |
0.7%
|
|
| 1989 | 5 |
1.7%
|
|
| 1990 | 3 |
1%
|
|
| 1991 | 1 |
0.3%
|
|
| 1992 | 3 |
1%
|
|
| 1994 | 1 |
0.3%
|
|
| 1995 | 3 |
1%
|
|
| 1996 | 2 |
0.7%
|
|
| 1997 | 5 |
1.7%
|
|
| 1998 | 4 |
1.4%
|
|
| 1999 | 1 |
0.3%
|
|
| 2000 | 4 |
1.4%
|
|
| 2001 | 2 |
0.7%
|
|
| 2002 | 6 |
2%
|
|
| 2003 | 4 |
1.4%
|
|
| 2004 | 4 |
1.4%
|
|
| 2005 | 4 |
1.4%
|
|
| 2006 | 6 |
2%
|
|
| 2007 | 5 |
1.7%
|
|
| 2008 | 7 |
2.4%
|
|
| 2009 | 10 |
3.4%
|
|
| 2010 | 3 |
1%
|
|
| 2011 | 2 |
0.7%
|
|
| 2012 | 6 |
2%
|
|
| 2013 | 2 |
0.7%
|
|
| 2014 | 4 |
1.4%
|
|
| 2015 | 1 |
0.3%
|
|
| 3333 | Missing | 1 |
0.3%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 1 |
0.3%
|
| 9999 | Don't know | 163 |
55.4%
|
| Sysmiss | 26510 |