| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 1 |
0.2%
|
|
| 1990 | 5 |
0.8%
|
|
| 1992 | 1 |
0.2%
|
|
| 1993 | 2 |
0.3%
|
|
| 1996 | 1 |
0.2%
|
|
| 2008 | 6 |
1%
|
|
| 2009 | 2 |
0.3%
|
|
| 2012 | 2 |
0.3%
|
|
| 2013 | 3 |
0.5%
|
|
| 2014 | 22 |
3.6%
|
|
| 2015 | 9 |
1.5%
|
|
| 2016 | 91 |
14.8%
|
|
| 2017 | 68 |
11.1%
|
|
| 2018 | 40 |
6.5%
|
|
| 2019 | 6 |
1%
|
|
| Missing value | 356 |
57.9%
|