| Value |
Category |
| 1 |
Not at all |
| 2 |
1-4 hours a year |
| 3 |
5-19 hours year |
| 4 |
20-49 hours a year |
| 5 |
50 or more hours a year |
| 7 |
N/A |
| 8 |
Invalid |
| 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.