| Training duration | Representation in the survey | |
| 2015 survey | 2018 survey | |
| 1 - 5 days | 51.72 | 30.4 |
| 6 - 30 days | 17.2 (from 6 days to 1.5 months) | 8.9 |
| More than 2 months | 5.2 (more than 4 months) | 4.1 |
| Have not participated in the training | 25.88 | 56.6 |