| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 1 |
2.5%
|
|
| 2002 | 1 |
2.5%
|
|
| 2004 | 1 |
2.5%
|
|
| 2005 | 1 |
2.5%
|
|
| 2007 | 3 |
7.5%
|
|
| 2008 | 3 |
7.5%
|
|
| 2009 | 4 |
10%
|
|
| 2010 | 3 |
7.5%
|
|
| 2011 | 5 |
12.5%
|
|
| 2012 | 6 |
15%
|
|
| 2013 | 5 |
12.5%
|
|
| 2014 | 7 |
17.5%
|
|
| Sysmiss | 69 |