| Value | Category | Cases | |
|---|---|---|---|
| 2014 | 1 |
0.2%
|
|
| 2015 | 8 |
1.7%
|
|
| 2016 | 21 |
4.5%
|
|
| 2017 | 85 |
18.3%
|
|
| 2018 | 135 |
29.1%
|
|
| 2019 | 180 |
38.8%
|
|
| 2020 | 34 |
7.3%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 12485 |