| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 1 |
0%
|
|
| 1971 | 3 |
0.1%
|
|
| 1972 | 3 |
0.1%
|
|
| 1973 | 3 |
0.1%
|
|
| 1974 | 1 |
0%
|
|
| 1976 | 1 |
0%
|
|
| 1977 | 1 |
0%
|
|
| 1979 | 11 |
0.4%
|
|
| 1980 | 29 |
1%
|
|
| 1981 | 16 |
0.5%
|
|
| 1982 | 18 |
0.6%
|
|
| 1983 | 17 |
0.6%
|
|
| 1984 | 17 |
0.6%
|
|
| 1985 | 33 |
1.1%
|
|
| 1986 | 26 |
0.9%
|
|
| 1987 | 28 |
0.9%
|
|
| 1988 | 18 |
0.6%
|
|
| 1989 | 22 |
0.7%
|
|
| 1990 | 63 |
2.1%
|
|
| 1991 | 45 |
1.5%
|
|
| 1992 | 27 |
0.9%
|
|
| 1993 | 56 |
1.9%
|
|
| 1994 | 38 |
1.3%
|
|
| 1995 | 53 |
1.8%
|
|
| 1996 | 73 |
2.4%
|
|
| 1997 | 44 |
1.5%
|
|
| 1998 | 64 |
2.1%
|
|
| 1999 | 88 |
2.9%
|
|
| 2000 | 163 |
5.4%
|
|
| 2001 | 138 |
4.6%
|
|
| 2002 | 86 |
2.9%
|
|
| 2003 | 119 |
4%
|
|
| 2004 | 152 |
5.1%
|
|
| 2005 | 211 |
7%
|
|
| 2006 | 208 |
6.9%
|
|
| 2007 | 209 |
7%
|
|
| 2008 | 287 |
9.6%
|
|
| 2009 | 345 |
11.5%
|
|
| 2010 | 209 |
7%
|
|
| 2011 | 75 |
2.5%
|
|
| Sysmiss | 2 |