| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
1.4%
|
|
| 1960 | 1 |
0.7%
|
|
| 1979 | 1 |
0.7%
|
|
| 1988 | 1 |
0.7%
|
|
| 1989 | 1 |
0.7%
|
|
| 1990 | 1 |
0.7%
|
|
| 1992 | 2 |
1.4%
|
|
| 1993 | 1 |
0.7%
|
|
| 1994 | 1 |
0.7%
|
|
| 1995 | 3 |
2%
|
|
| 1996 | 2 |
1.4%
|
|
| 1997 | 1 |
0.7%
|
|
| 1998 | 5 |
3.4%
|
|
| 1999 | 4 |
2.7%
|
|
| 2000 | 15 |
10.2%
|
|
| 2001 | 2 |
1.4%
|
|
| 2002 | 7 |
4.8%
|
|
| 2003 | 2 |
1.4%
|
|
| 2004 | 4 |
2.7%
|
|
| 2005 | 13 |
8.8%
|
|
| 2006 | 7 |
4.8%
|
|
| 2007 | 3 |
2%
|
|
| 2008 | 9 |
6.1%
|
|
| 2009 | 5 |
3.4%
|
|
| 2010 | 3 |
2%
|
|
| 2011 | 1 |
0.7%
|
|
| 2012 | 7 |
4.8%
|
|
| 2013 | 6 |
4.1%
|
|
| 2014 | 6 |
4.1%
|
|
| 2015 | 9 |
6.1%
|
|
| 2016 | 11 |
7.5%
|
|
| 2017 | 9 |
6.1%
|
|
| 2018 | 2 |
1.4%
|
|
| Sysmiss | 2491 |