| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 1 |
1%
|
|
| 1984 | 1 |
1%
|
|
| 1988 | 3 |
3.1%
|
|
| 1990 | 2 |
2%
|
|
| 1991 | 1 |
1%
|
|
| 1992 | 3 |
3.1%
|
|
| 1994 | 3 |
3.1%
|
|
| 1995 | 2 |
2%
|
|
| 1996 | 3 |
3.1%
|
|
| 1997 | 1 |
1%
|
|
| 1998 | 3 |
3.1%
|
|
| 1999 | 1 |
1%
|
|
| 2000 | 4 |
4.1%
|
|
| 2001 | 4 |
4.1%
|
|
| 2003 | 2 |
2%
|
|
| 2004 | 4 |
4.1%
|
|
| 2005 | 6 |
6.1%
|
|
| 2006 | 3 |
3.1%
|
|
| 2007 | 3 |
3.1%
|
|
| 2008 | 6 |
6.1%
|
|
| 2009 | 3 |
3.1%
|
|
| 2010 | 3 |
3.1%
|
|
| 2011 | 2 |
2%
|
|
| 2012 | 5 |
5.1%
|
|
| 2013 | 2 |
2%
|
|
| 2014 | 6 |
6.1%
|
|
| 2015 | 7 |
7.1%
|
|
| 2016 | 5 |
5.1%
|
|
| 2017 | 2 |
2%
|
|
| 2018 | 7 |
7.1%
|
|
| Sysmiss | 121592 |