| Value | Category | Cases | |
|---|---|---|---|
| 1970 | 1 |
0%
|
|
| 1972 | 4 |
0.1%
|
|
| 1974 | 1 |
0%
|
|
| 1975 | 3 |
0.1%
|
|
| 1978 | 2 |
0.1%
|
|
| 1979 | 28 |
0.9%
|
|
| 1980 | 27 |
0.9%
|
|
| 1981 | 14 |
0.5%
|
|
| 1982 | 19 |
0.6%
|
|
| 1983 | 17 |
0.6%
|
|
| 1984 | 19 |
0.6%
|
|
| 1985 | 25 |
0.8%
|
|
| 1986 | 18 |
0.6%
|
|
| 1987 | 26 |
0.9%
|
|
| 1988 | 31 |
1%
|
|
| 1989 | 31 |
1%
|
|
| 1990 | 96 |
3.2%
|
|
| 1991 | 30 |
1%
|
|
| 1992 | 43 |
1.4%
|
|
| 1993 | 58 |
1.9%
|
|
| 1994 | 35 |
1.2%
|
|
| 1995 | 68 |
2.3%
|
|
| 1996 | 35 |
1.2%
|
|
| 1997 | 50 |
1.7%
|
|
| 1998 | 71 |
2.4%
|
|
| 1999 | 68 |
2.3%
|
|
| 2000 | 228 |
7.6%
|
|
| 2001 | 81 |
2.7%
|
|
| 2002 | 113 |
3.8%
|
|
| 2003 | 143 |
4.8%
|
|
| 2004 | 155 |
5.2%
|
|
| 2005 | 231 |
7.7%
|
|
| 2006 | 221 |
7.4%
|
|
| 2007 | 305 |
10.2%
|
|
| 2008 | 310 |
10.3%
|
|
| 2009 | 319 |
10.6%
|
|
| 2010 | 73 |
2.4%
|
|
| Sysmiss | 13 |