| Value | Category | Cases | |
|---|---|---|---|
| 1984 | 1 |
0.5%
|
|
| 1989 | 1 |
0.5%
|
|
| 1990 | 1 |
0.5%
|
|
| 1991 | 1 |
0.5%
|
|
| 1997 | 1 |
0.5%
|
|
| 1998 | 3 |
1.6%
|
|
| 1999 | 1 |
0.5%
|
|
| 2000 | 9 |
4.9%
|
|
| 2001 | 1 |
0.5%
|
|
| 2002 | 5 |
2.7%
|
|
| 2003 | 2 |
1.1%
|
|
| 2004 | 7 |
3.8%
|
|
| 2005 | 5 |
2.7%
|
|
| 2006 | 11 |
5.9%
|
|
| 2007 | 4 |
2.2%
|
|
| 2008 | 15 |
8.1%
|
|
| 2009 | 13 |
7%
|
|
| 2010 | 18 |
9.7%
|
|
| 2011 | 11 |
5.9%
|
|
| 2012 | 17 |
9.2%
|
|
| 2013 | 25 |
13.5%
|
|
| 2014 | 28 |
15.1%
|
|
| 2015 | 5 |
2.7%
|
|
| Sysmiss | 5993 |