| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
2.2%
|
|
| 1987 | 1 |
2.2%
|
|
| 1992 | 1 |
2.2%
|
|
| 1996 | 1 |
2.2%
|
|
| 2002 | 2 |
4.3%
|
|
| 2004 | 1 |
2.2%
|
|
| 2005 | 4 |
8.7%
|
|
| 2007 | 1 |
2.2%
|
|
| 2008 | 2 |
4.3%
|
|
| 2010 | 4 |
8.7%
|
|
| 2011 | 2 |
4.3%
|
|
| 2012 | 3 |
6.5%
|
|
| 2013 | 1 |
2.2%
|
|
| 2014 | 7 |
15.2%
|
|
| 2015 | 4 |
8.7%
|
|
| 2016 | 5 |
10.9%
|
|
| 2017 | 4 |
8.7%
|
|
| 2018 | 2 |
4.3%
|
|
| Sysmiss | 2592 |