| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
1.4%
|
|
| 1993 | 1 |
1.4%
|
|
| 1995 | 1 |
1.4%
|
|
| 1998 | 2 |
2.9%
|
|
| 2000 | 4 |
5.7%
|
|
| 2003 | 1 |
1.4%
|
|
| 2004 | 1 |
1.4%
|
|
| 2005 | 3 |
4.3%
|
|
| 2007 | 3 |
4.3%
|
|
| 2008 | 7 |
10%
|
|
| 2009 | 1 |
1.4%
|
|
| 2010 | 10 |
14.3%
|
|
| 2011 | 3 |
4.3%
|
|
| 2012 | 1 |
1.4%
|
|
| 2013 | 3 |
4.3%
|
|
| 2014 | 3 |
4.3%
|
|
| 2015 | 5 |
7.1%
|
|
| 2016 | 9 |
12.9%
|
|
| 2017 | 9 |
12.9%
|
|
| 2018 | 2 |
2.9%
|
|
| Sysmiss | 1 |