| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1994 | 2 |
0.2%
|
| 2 | 1997 | 2 |
0.2%
|
| 3 | 2012 | 2 |
0.2%
|
| 4 | 2015 | 4 |
0.5%
|
| 5 | 2017 | 369 |
41.9%
|
| Missing value | 502 |
57%
|