| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 17 |
10.1%
|
|
| 1998 | 1 |
0.6%
|
|
| 2000 | 8 |
4.8%
|
|
| 2001 | 2 |
1.2%
|
|
| 2002 | 1 |
0.6%
|
|
| 2003 | 2 |
1.2%
|
|
| 2004 | 3 |
1.8%
|
|
| 2007 | 2 |
1.2%
|
|
| 2009 | 15 |
8.9%
|
|
| 2010 | 1 |
0.6%
|
|
| 2011 | 2 |
1.2%
|
|
| 2012 | 1 |
0.6%
|
|
| 2013 | 49 |
29.2%
|
|
| 2014 | 39 |
23.2%
|
|
| 2015 | 17 |
10.1%
|
|
| 2016 | 5 |
3%
|
|
| 2017 | 3 |
1.8%
|