| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
0%
|
|
| 1975 | 6 |
0.3%
|
|
| 1976 | 7 |
0.3%
|
|
| 1977 | 5 |
0.2%
|
|
| 1978 | 12 |
0.6%
|
|
| 1979 | 8 |
0.4%
|
|
| 1980 | 12 |
0.6%
|
|
| 1981 | 12 |
0.6%
|
|
| 1982 | 23 |
1.1%
|
|
| 1983 | 23 |
1.1%
|
|
| 1984 | 40 |
2%
|
|
| 1985 | 42 |
2.1%
|
|
| 1986 | 56 |
2.8%
|
|
| 1987 | 54 |
2.7%
|
|
| 1988 | 61 |
3%
|
|
| 1989 | 71 |
3.5%
|
|
| 1990 | 73 |
3.6%
|
|
| 1991 | 56 |
2.8%
|
|
| 1992 | 82 |
4.1%
|
|
| 1993 | 64 |
3.2%
|
|
| 1994 | 84 |
4.2%
|
|
| 1995 | 80 |
4%
|
|
| 1996 | 90 |
4.5%
|
|
| 1997 | 75 |
3.7%
|
|
| 1998 | 126 |
6.2%
|
|
| 1999 | 98 |
4.8%
|
|
| 2000 | 140 |
6.9%
|
|
| 2001 | 81 |
4%
|
|
| 2002 | 135 |
6.7%
|
|
| 2003 | 117 |
5.8%
|
|
| 2004 | 100 |
4.9%
|
|
| 2005 | 96 |
4.7%
|
|
| 2006 | 47 |
2.3%
|
|
| 2007 | 24 |
1.2%
|
|
| 2008 | 16 |
0.8%
|
|
| 2009 | 5 |
0.2%
|