| Value |
Category |
| 1 |
No knowledge |
| 2 |
Too expensive |
| 3 |
Not available |
| 4 |
Can not see the usefulness |
| 6 |
Other, specify |
| 9 |
Missing |
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.