| Value | Category | Cases | |
|---|---|---|---|
| 1984 | 1 |
0.4%
|
|
| 2000 | 2 |
0.9%
|
|
| 2002 | 2 |
0.9%
|
|
| 2003 | 1 |
0.4%
|
|
| 2004 | 3 |
1.3%
|
|
| 2005 | 3 |
1.3%
|
|
| 2006 | 3 |
1.3%
|
|
| 2007 | 4 |
1.8%
|
|
| 2008 | 4 |
1.8%
|
|
| 2009 | 6 |
2.7%
|
|
| 2010 | 6 |
2.7%
|
|
| 2011 | 7 |
3.1%
|
|
| 2012 | 13 |
5.8%
|
|
| 2013 | 32 |
14.2%
|
|
| 2014 | 65 |
28.8%
|
|
| 2015 | 72 |
31.9%
|
|
| 9998 | 2 |
0.9%
|
|
| Sysmiss | 7 |