| Value | Category |
|---|---|
| -9 | Missing Data |
| 1 | Under 10 minutes |
| 2 | About 10 minutes |
| 3 | Between 10 and 20 minutes |
| 4 | About 20 minutes |
| 5 | Between 20 and 30 minutes |
| 6 | About 30 minutes |
| 7 | Between 30 minutes and 60 minutes |
| 8 | About an hour |
| 9 | More than an hour |
| 10 | Up to a day |
| 11 | More than a day |
| 12 | Don't know |