| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 6 |
9%
|
|
| 2011 | 8 |
11.9%
|
|
| 2012 | 10 |
14.9%
|
|
| 2013 | 13 |
19.4%
|
|
| 2014 | 18 |
26.9%
|
|
| 2015 | 11 |
16.4%
|
|
| 2016 | 1 |
1.5%
|