| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
0.3%
|
|
| 1975 | 2 |
0.6%
|
|
| 1976 | 1 |
0.3%
|
|
| 1979 | 1 |
0.3%
|
|
| 1980 | 2 |
0.6%
|
|
| 1983 | 2 |
0.6%
|
|
| 1984 | 1 |
0.3%
|
|
| 1987 | 1 |
0.3%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 4 |
1.2%
|
|
| 1990 | 7 |
2%
|
|
| 1991 | 5 |
1.5%
|
|
| 1993 | 3 |
0.9%
|
|
| 1994 | 9 |
2.6%
|
|
| 1995 | 15 |
4.4%
|
|
| 1996 | 7 |
2%
|
|
| 1997 | 6 |
1.7%
|
|
| 1998 | 7 |
2%
|
|
| 1999 | 5 |
1.5%
|
|
| 2000 | 7 |
2%
|
|
| 2001 | 9 |
2.6%
|
|
| 2002 | 4 |
1.2%
|
|
| 2003 | 17 |
4.9%
|
|
| 2004 | 15 |
4.4%
|
|
| 2005 | 20 |
5.8%
|
|
| 2006 | 13 |
3.8%
|
|
| 2007 | 19 |
5.5%
|
|
| 2008 | 19 |
5.5%
|
|
| 2009 | 13 |
3.8%
|
|
| 2010 | 27 |
7.8%
|
|
| 2011 | 18 |
5.2%
|
|
| 2012 | 26 |
7.6%
|
|
| 2013 | 25 |
7.3%
|
|
| 2014 | 31 |
9%
|
|
| 2015 | 1 |
0.3%
|
|
| Sysmiss | 16307 |