Value |
Category |
-9 |
Don't know (spontaneous) |
1 |
One hour or less |
3 |
|
4 |
|
5 |
|
16 |
|
24 |
|
30 |
|
42 |
|
78 |
|
144 |
|
168 |
|
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.