| Value | Category | Cases | |
|---|---|---|---|
| 1965 | 1 |
1.4%
|
|
| 1970 | 1 |
1.4%
|
|
| 1972 | 3 |
4.1%
|
|
| 1973 | 3 |
4.1%
|
|
| 1976 | 1 |
1.4%
|
|
| 1979 | 1 |
1.4%
|
|
| 1980 | 1 |
1.4%
|
|
| 1981 | 2 |
2.7%
|
|
| 1983 | 3 |
4.1%
|
|
| 1984 | 1 |
1.4%
|
|
| 1985 | 1 |
1.4%
|
|
| 1986 | 1 |
1.4%
|
|
| 1987 | 4 |
5.4%
|
|
| 1988 | 1 |
1.4%
|
|
| 1989 | 3 |
4.1%
|
|
| 1990 | 3 |
4.1%
|
|
| 1991 | 2 |
2.7%
|
|
| 1992 | 2 |
2.7%
|
|
| 1993 | 1 |
1.4%
|
|
| 1995 | 3 |
4.1%
|
|
| 1996 | 5 |
6.8%
|
|
| 1997 | 1 |
1.4%
|
|
| 1998 | 3 |
4.1%
|
|
| 1999 | 3 |
4.1%
|
|
| 2000 | 2 |
2.7%
|
|
| 2001 | 1 |
1.4%
|
|
| 2002 | 2 |
2.7%
|
|
| 2004 | 2 |
2.7%
|
|
| 2006 | 3 |
4.1%
|
|
| 2007 | 1 |
1.4%
|
|
| 2010 | 2 |
2.7%
|
|
| 2012 | 1 |
1.4%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 10 |
13.5%
|
| Sysmiss | 925 |