| Value | Category | Cases | |
|---|---|---|---|
| 0 | Knows no method | 1914 |
12.4%
|
| 1 | Knows only folkloric | 39 |
0.3%
|
| 2 | Knows only trad. Mth | 92 |
0.6%
|
| 3 | Knows modern method | 13441 |
86.8%
|
| Sysmiss | 1236 |