| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 1 |
0.6%
|
|
| 1990 | 1 |
0.6%
|
|
| 1992 | 2 |
1.2%
|
|
| 1996 | 1 |
0.6%
|
|
| 1999 | 1 |
0.6%
|
|
| 2000 | 1 |
0.6%
|
|
| 2002 | 1 |
0.6%
|
|
| 2003 | 1 |
0.6%
|
|
| 2004 | 2 |
1.2%
|
|
| 2005 | 4 |
2.5%
|
|
| 2006 | 2 |
1.2%
|
|
| 2007 | 2 |
1.2%
|
|
| 2008 | 4 |
2.5%
|
|
| 2009 | 3 |
1.9%
|
|
| 2010 | 12 |
7.4%
|
|
| 2011 | 16 |
9.9%
|
|
| 2012 | 29 |
17.9%
|
|
| 2013 | 39 |
24.1%
|
|
| 2014 | 23 |
14.2%
|
|
| 2015 | 16 |
9.9%
|
|
| 9999 | 1 |
0.6%
|
|
| Sysmiss | 38 |