| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 11 |
3.8%
|
|
| 1997 | 2 |
0.7%
|
|
| 1998 | 5 |
1.7%
|
|
| 1999 | 2 |
0.7%
|
|
| 2000 | 1 |
0.3%
|
|
| 2001 | 1 |
0.3%
|
|
| 2004 | 3 |
1%
|
|
| 2005 | 1 |
0.3%
|
|
| 2006 | 2 |
0.7%
|
|
| 2009 | 2 |
0.7%
|
|
| 2014 | 5 |
1.7%
|
|
| 2015 | 110 |
38.3%
|
|
| 2016 | 86 |
30%
|
|
| 2017 | 23 |
8%
|
|
| 2018 | 3 |
1%
|
|
| Missing value | 30 |
10.5%
|