| Years | Total | Male | fEmale | |||
| Tested samples | Positivity rate (%) | Tested samples | Positivity rate (%) | Tested samples | Positivity rate (%) | |
| 2017 | 1089 | 18.2 | 587 | 19.6 | 502 | 16.5 |
| 2018 | 533 | 7.9 | 281 | 6.0 | 252 | 9.9 |
| 2019 | 1367 | 27.9 | 711 | 26.6 | 656 | 29.3 |
| 2020 | 411 | 9.2 | 205 | 6.8 | 206 | 11.6 |