| Value |
Category |
| 1 |
very effective |
| 2 |
effective |
| 3 |
somewhat effective |
| 4 |
not very effective |
| 8 |
do not know |
| 9 |
never heard of it |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
