| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
1%
|
|
| 2000 | 3 |
3.1%
|
|
| 2001 | 1 |
1%
|
|
| 2002 | 1 |
1%
|
|
| 2003 | 4 |
4.2%
|
|
| 2004 | 2 |
2.1%
|
|
| 2005 | 2 |
2.1%
|
|
| 2006 | 5 |
5.2%
|
|
| 2007 | 12 |
12.5%
|
|
| 2008 | 8 |
8.3%
|
|
| 2009 | 14 |
14.6%
|
|
| 2010 | 8 |
8.3%
|
|
| 2011 | 9 |
9.4%
|
|
| 2012 | 7 |
7.3%
|
|
| 2013 | 13 |
13.5%
|
|
| 2014 | 4 |
4.2%
|
|
| 2015 | 2 |
2.1%
|
|
| Sysmiss | 9764 |