| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.2%
|
|
| 1975 | 1 |
0.2%
|
|
| 1980 | 3 |
0.7%
|
|
| 1982 | 2 |
0.5%
|
|
| 1984 | 1 |
0.2%
|
|
| 1985 | 1 |
0.2%
|
|
| 1986 | 1 |
0.2%
|
|
| 1987 | 3 |
0.7%
|
|
| 1988 | 1 |
0.2%
|
|
| 1989 | 1 |
0.2%
|
|
| 1990 | 3 |
0.7%
|
|
| 1991 | 2 |
0.5%
|
|
| 1992 | 5 |
1.2%
|
|
| 1993 | 2 |
0.5%
|
|
| 1994 | 2 |
0.5%
|
|
| 1995 | 2 |
0.5%
|
|
| 1996 | 3 |
0.7%
|
|
| 1997 | 1 |
0.2%
|
|
| 1998 | 6 |
1.4%
|
|
| 1999 | 7 |
1.7%
|
|
| 2000 | 16 |
3.8%
|
|
| 2001 | 13 |
3.1%
|
|
| 2002 | 15 |
3.6%
|
|
| 2003 | 4 |
1%
|
|
| 2004 | 9 |
2.1%
|
|
| 2005 | 15 |
3.6%
|
|
| 2006 | 12 |
2.9%
|
|
| 2007 | 8 |
1.9%
|
|
| 2008 | 26 |
6.2%
|
|
| 2009 | 7 |
1.7%
|
|
| 2010 | 25 |
6%
|
|
| 2011 | 9 |
2.1%
|
|
| 2012 | 18 |
4.3%
|
|
| 2013 | 14 |
3.3%
|
|
| 2014 | 40 |
9.5%
|
|
| 2015 | 44 |
10.5%
|
|
| 2016 | 35 |
8.4%
|
|
| 2017 | 52 |
12.4%
|
|
| 2018 | 9 |
2.1%
|
|
| Sysmiss | 2219 |