| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 4 |
1.7%
|
| -7 | never registered | 3 |
1.2%
|
| 1959 | 1 |
0.4%
|
|
| 1962 | 2 |
0.8%
|
|
| 1967 | 1 |
0.4%
|
|
| 1970 | 1 |
0.4%
|
|
| 1971 | 1 |
0.4%
|
|
| 1972 | 1 |
0.4%
|
|
| 1973 | 1 |
0.4%
|
|
| 1975 | 1 |
0.4%
|
|
| 1976 | 4 |
1.7%
|
|
| 1977 | 1 |
0.4%
|
|
| 1979 | 2 |
0.8%
|
|
| 1980 | 1 |
0.4%
|
|
| 1982 | 2 |
0.8%
|
|
| 1983 | 2 |
0.8%
|
|
| 1984 | 2 |
0.8%
|
|
| 1985 | 2 |
0.8%
|
|
| 1986 | 3 |
1.2%
|
|
| 1988 | 1 |
0.4%
|
|
| 1989 | 3 |
1.2%
|
|
| 1990 | 1 |
0.4%
|
|
| 1991 | 1 |
0.4%
|
|
| 1992 | 3 |
1.2%
|
|
| 1995 | 11 |
4.6%
|
|
| 1996 | 11 |
4.6%
|
|
| 1997 | 3 |
1.2%
|
|
| 1998 | 12 |
5%
|
|
| 1999 | 11 |
4.6%
|
|
| 2000 | 6 |
2.5%
|
|
| 2001 | 7 |
2.9%
|
|
| 2002 | 12 |
5%
|
|
| 2003 | 9 |
3.7%
|
|
| 2004 | 13 |
5.4%
|
|
| 2005 | 10 |
4.1%
|
|
| 2006 | 16 |
6.6%
|
|
| 2007 | 21 |
8.7%
|
|
| 2008 | 32 |
13.3%
|
|
| 2009 | 20 |
8.3%
|
|
| 2010 | 3 |
1.2%
|