| Value | Category | Cases | |
|---|---|---|---|
| 1948 | 1 |
0.3%
|
|
| 1951 | 1 |
0.3%
|
|
| 1955 | 1 |
0.3%
|
|
| 1960 | 1 |
0.3%
|
|
| 1967 | 1 |
0.3%
|
|
| 1969 | 1 |
0.3%
|
|
| 1974 | 1 |
0.3%
|
|
| 1976 | 1 |
0.3%
|
|
| 1978 | 2 |
0.5%
|
|
| 1979 | 1 |
0.3%
|
|
| 1980 | 3 |
0.8%
|
|
| 1981 | 3 |
0.8%
|
|
| 1982 | 3 |
0.8%
|
|
| 1983 | 4 |
1%
|
|
| 1984 | 1 |
0.3%
|
|
| 1985 | 3 |
0.8%
|
|
| 1986 | 2 |
0.5%
|
|
| 1988 | 2 |
0.5%
|
|
| 1989 | 6 |
1.5%
|
|
| 1990 | 12 |
3%
|
|
| 1991 | 5 |
1.3%
|
|
| 1992 | 8 |
2%
|
|
| 1993 | 5 |
1.3%
|
|
| 1994 | 10 |
2.5%
|
|
| 1995 | 15 |
3.8%
|
|
| 1996 | 18 |
4.5%
|
|
| 1997 | 18 |
4.5%
|
|
| 1998 | 26 |
6.5%
|
|
| 1999 | 20 |
5%
|
|
| 2000 | 18 |
4.5%
|
|
| 2001 | 26 |
6.5%
|
|
| 2002 | 33 |
8.3%
|
|
| 2003 | 27 |
6.8%
|
|
| 2004 | 26 |
6.5%
|
|
| 2005 | 23 |
5.8%
|
|
| 2006 | 17 |
4.3%
|
|
| 2007 | 18 |
4.5%
|
|
| 2008 | 31 |
7.8%
|
|
| 2009 | 4 |
1%
|
|
| 2147483622 | Not applicable | 0 |
0%
|
| 2147483623 | Refusal | 0 |
0%
|
| 2147483624 | Don't know | 0 |
0%
|
| 2147483625 | No answer | 0 |
0%
|
| 10001 | .D | 56354 |