| Value | Category | Cases | |
|---|---|---|---|
| 1959 | 1 |
0%
|
|
| 1960 | 1 |
0%
|
|
| 1961 | 1 |
0%
|
|
| 1963 | 2 |
0.1%
|
|
| 1965 | 1 |
0%
|
|
| 1966 | 1 |
0%
|
|
| 1967 | 1 |
0%
|
|
| 1970 | 2 |
0.1%
|
|
| 1972 | 1 |
0%
|
|
| 1975 | 2 |
0.1%
|
|
| 1978 | 2 |
0.1%
|
|
| 1979 | 1 |
0%
|
|
| 1980 | 1 |
0%
|
|
| 1981 | 1 |
0%
|
|
| 1982 | 2 |
0.1%
|
|
| 1983 | 1 |
0%
|
|
| 1984 | 1 |
0%
|
|
| 1985 | 1 |
0%
|
|
| 1986 | 4 |
0.2%
|
|
| 1987 | 2 |
0.1%
|
|
| 1988 | 1 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 6 |
0.2%
|
|
| 1992 | 7 |
0.3%
|
|
| 1993 | 4 |
0.2%
|
|
| 1994 | 3 |
0.1%
|
|
| 1995 | 2 |
0.1%
|
|
| 1996 | 4 |
0.2%
|
|
| 1997 | 5 |
0.2%
|
|
| 1998 | 7 |
0.3%
|
|
| 1999 | 9 |
0.4%
|
|
| 2000 | 23 |
0.9%
|
|
| 2001 | 25 |
1%
|
|
| 2002 | 26 |
1%
|
|
| 2003 | 34 |
1.3%
|
|
| 2004 | 78 |
3.1%
|
|
| 2005 | 231 |
9%
|
|
| 2006 | 1262 |
49.4%
|
|
| 2007 | 370 |
14.5%
|
|
| 2008 | 6 |
0.2%
|
|
| 2009 | 1 |
0%
|
|
| 8888 | never | 404 |
15.8%
|
| 9995 | 2 |
0.1%
|
|
| 9997 | refused | 0 |
0%
|
| 9998 | don’t know | 13 |
0.5%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 3338 |