| Value |
Category |
| 1 |
No need to travel - source is on site |
| 2 |
Less than 2 minutes |
| 3 |
3-5 minutes |
| 4 |
6-10 minutes |
| 5 |
11-20 minutes |
| 6 |
More than 20 minutes |
| 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.