| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0%
|
|
| 1963 | 1 |
0%
|
|
| 1964 | 1 |
0%
|
|
| 1967 | 1 |
0%
|
|
| 1969 | 3 |
0%
|
|
| 1970 | 7 |
0.1%
|
|
| 1971 | 2 |
0%
|
|
| 1972 | 5 |
0.1%
|
|
| 1973 | 6 |
0.1%
|
|
| 1974 | 5 |
0.1%
|
|
| 1975 | 10 |
0.1%
|
|
| 1976 | 1 |
0%
|
|
| 1977 | 9 |
0.1%
|
|
| 1978 | 6 |
0.1%
|
|
| 1979 | 74 |
0.9%
|
|
| 1980 | 66 |
0.8%
|
|
| 1981 | 52 |
0.6%
|
|
| 1982 | 50 |
0.6%
|
|
| 1983 | 61 |
0.8%
|
|
| 1984 | 60 |
0.7%
|
|
| 1985 | 83 |
1%
|
|
| 1986 | 80 |
1%
|
|
| 1987 | 84 |
1%
|
|
| 1988 | 74 |
0.9%
|
|
| 1989 | 176 |
2.2%
|
|
| 1990 | 182 |
2.3%
|
|
| 1991 | 85 |
1.1%
|
|
| 1992 | 108 |
1.3%
|
|
| 1993 | 169 |
2.1%
|
|
| 1994 | 142 |
1.8%
|
|
| 1995 | 158 |
2%
|
|
| 1996 | 122 |
1.5%
|
|
| 1997 | 139 |
1.7%
|
|
| 1998 | 196 |
2.4%
|
|
| 1999 | 325 |
4%
|
|
| 2000 | 426 |
5.3%
|
|
| 2001 | 278 |
3.5%
|
|
| 2002 | 370 |
4.6%
|
|
| 2003 | 454 |
5.6%
|
|
| 2004 | 535 |
6.6%
|
|
| 2005 | 604 |
7.5%
|
|
| 2006 | 784 |
9.7%
|
|
| 2007 | 951 |
11.8%
|
|
| 2008 | 855 |
10.6%
|
|
| 2009 | 248 |
3.1%
|