| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.9%
|
|
| 1965 | 1 |
0.9%
|
|
| 1968 | 1 |
0.9%
|
|
| 1969 | 2 |
1.7%
|
|
| 1971 | 4 |
3.4%
|
|
| 1972 | 2 |
1.7%
|
|
| 1975 | 1 |
0.9%
|
|
| 1977 | 2 |
1.7%
|
|
| 1978 | 2 |
1.7%
|
|
| 1979 | 3 |
2.6%
|
|
| 1980 | 3 |
2.6%
|
|
| 1982 | 2 |
1.7%
|
|
| 1983 | 1 |
0.9%
|
|
| 1985 | 5 |
4.3%
|
|
| 1986 | 2 |
1.7%
|
|
| 1987 | 4 |
3.4%
|
|
| 1988 | 3 |
2.6%
|
|
| 1989 | 2 |
1.7%
|
|
| 1990 | 6 |
5.1%
|
|
| 1991 | 4 |
3.4%
|
|
| 1992 | 1 |
0.9%
|
|
| 1993 | 4 |
3.4%
|
|
| 1995 | 2 |
1.7%
|
|
| 1996 | 4 |
3.4%
|
|
| 1997 | 2 |
1.7%
|
|
| 1998 | 2 |
1.7%
|
|
| 1999 | 4 |
3.4%
|
|
| 2000 | 1 |
0.9%
|
|
| 2001 | 4 |
3.4%
|
|
| 2002 | 2 |
1.7%
|
|
| 2003 | 2 |
1.7%
|
|
| 2004 | 2 |
1.7%
|
|
| 2005 | 4 |
3.4%
|
|
| 2006 | 4 |
3.4%
|
|
| 2007 | 2 |
1.7%
|
|
| 2008 | 3 |
2.6%
|
|
| 2010 | 1 |
0.9%
|
|
| 2011 | 1 |
0.9%
|
|
| 2012 | 2 |
1.7%
|
|
| 2013 | 3 |
2.6%
|
|
| 2014 | 1 |
0.9%
|
|
| 2015 | 1 |
0.9%
|
|
| 2016 | 3 |
2.6%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 11 |
9.4%
|
| Sysmiss | 882 |