| Value | Category | Cases | |
|---|---|---|---|
| 1956 | 1 |
0.1%
|
|
| 1958 | 1 |
0.1%
|
|
| 1959 | 3 |
0.2%
|
|
| 1961 | 2 |
0.1%
|
|
| 1962 | 3 |
0.2%
|
|
| 1963 | 1 |
0.1%
|
|
| 1964 | 6 |
0.4%
|
|
| 1965 | 3 |
0.2%
|
|
| 1966 | 4 |
0.3%
|
|
| 1967 | 2 |
0.1%
|
|
| 1968 | 8 |
0.6%
|
|
| 1969 | 13 |
0.9%
|
|
| 1970 | 15 |
1%
|
|
| 1971 | 10 |
0.7%
|
|
| 1972 | 15 |
1%
|
|
| 1973 | 15 |
1%
|
|
| 1974 | 18 |
1.2%
|
|
| 1975 | 27 |
1.9%
|
|
| 1976 | 17 |
1.2%
|
|
| 1977 | 25 |
1.7%
|
|
| 1978 | 27 |
1.9%
|
|
| 1979 | 27 |
1.9%
|
|
| 1980 | 25 |
1.7%
|
|
| 1981 | 20 |
1.4%
|
|
| 1982 | 34 |
2.3%
|
|
| 1983 | 37 |
2.5%
|
|
| 1984 | 23 |
1.6%
|
|
| 1985 | 35 |
2.4%
|
|
| 1986 | 24 |
1.7%
|
|
| 1987 | 38 |
2.6%
|
|
| 1988 | 37 |
2.5%
|
|
| 1989 | 38 |
2.6%
|
|
| 1990 | 47 |
3.2%
|
|
| 1991 | 29 |
2%
|
|
| 1992 | 41 |
2.8%
|
|
| 1993 | 36 |
2.5%
|
|
| 1994 | 35 |
2.4%
|
|
| 1995 | 32 |
2.2%
|
|
| 1996 | 38 |
2.6%
|
|
| 1997 | 32 |
2.2%
|
|
| 1998 | 29 |
2%
|
|
| 1999 | 22 |
1.5%
|
|
| 2000 | 25 |
1.7%
|
|
| 2001 | 17 |
1.2%
|
|
| 2002 | 20 |
1.4%
|
|
| 2003 | 20 |
1.4%
|
|
| 2004 | 20 |
1.4%
|
|
| 2005 | 16 |
1.1%
|
|
| 2006 | 13 |
0.9%
|
|
| 2007 | 14 |
1%
|
|
| 2008 | 24 |
1.7%
|
|
| 2009 | 17 |
1.2%
|
|
| 2010 | 14 |
1%
|
|
| 2011 | 8 |
0.6%
|
|
| 2012 | 8 |
0.6%
|
|
| 2013 | 13 |
0.9%
|
|
| 2014 | 20 |
1.4%
|
|
| 2015 | 10 |
0.7%
|
|
| 2016 | 11 |
0.8%
|
|
| 2017 | 1 |
0.1%
|
|
| 3333 | Missing | 1 |
0.1%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 286 |
19.7%
|
| Sysmiss | 28657 |