| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
0.2%
|
|
| 1999 | 1 |
0.2%
|
|
| 2012 | 1 |
0.2%
|
|
| 2014 | 1 |
0.2%
|
|
| 2015 | 3 |
0.7%
|
|
| 2016 | 8 |
1.8%
|
|
| 2017 | 62 |
14.2%
|
|
| 2018 | 358 |
82.1%
|
|
| Missing value | 1 |
0.2%
|