| Value | Category | Cases | |
|---|---|---|---|
| 1 | TV | 917 |
34.2%
|
| 2 | Radio | 174 |
6.5%
|
| 3 | Pamphlets | 176 |
6.6%
|
| 4 | Posters | 51 |
1.9%
|
| 5 | Youth magazine | 339 |
12.6%
|
| 6 | Direct personal contact | 705 |
26.3%
|
| 7 | Seminars | 318 |
11.9%
|
| Sysmiss | 75 |