| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
0.3%
|
|
| 1979 | 2 |
0.7%
|
|
| 1980 | 5 |
1.7%
|
|
| 1984 | 1 |
0.3%
|
|
| 1985 | 3 |
1%
|
|
| 1987 | 1 |
0.3%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 1 |
0.3%
|
|
| 1990 | 3 |
1%
|
|
| 1991 | 1 |
0.3%
|
|
| 1992 | 6 |
2%
|
|
| 1993 | 9 |
3.1%
|
|
| 1994 | 6 |
2%
|
|
| 1995 | 17 |
5.8%
|
|
| 1996 | 3 |
1%
|
|
| 1997 | 4 |
1.4%
|
|
| 1998 | 12 |
4.1%
|
|
| 1999 | 10 |
3.4%
|
|
| 2000 | 18 |
6.1%
|
|
| 2001 | 8 |
2.7%
|
|
| 2002 | 3 |
1%
|
|
| 2003 | 11 |
3.8%
|
|
| 2004 | 4 |
1.4%
|
|
| 2005 | 8 |
2.7%
|
|
| 2006 | 9 |
3.1%
|
|
| 2007 | 24 |
8.2%
|
|
| 2008 | 23 |
7.8%
|
|
| 2009 | 16 |
5.5%
|
|
| 2010 | 36 |
12.3%
|
|
| 2011 | 13 |
4.4%
|
|
| 2012 | 15 |
5.1%
|
|
| 2013 | 19 |
6.5%
|
|
| Sysmiss | 385 |