Value |
Category |
-9 |
Don't know (spontaneous) |
1 |
One hour or less |
2 |
|
3 |
|
4 |
|
5 |
|
6 |
|
8 |
|
12 |
|
24 |
|
48 |
|
72 |
|
480 |
|
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.