| Value | Category | Cases | |
|---|---|---|---|
| 2014 | 1 |
0.1%
|
|
| 2015 | 23 |
2.6%
|
|
| 2016 | 38 |
4.4%
|
|
| 2017 | 140 |
16.1%
|
|
| 2018 | 283 |
32.5%
|
|
| 2019 | 333 |
38.2%
|
|
| 2020 | 54 |
6.2%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 12077 |