Value |
Category |
-9 |
Don't know (spontaneous) |
0 |
|
1 |
One minute or less |
10 |
|
15 |
|
20 |
|
30 |
|
40 |
|
45 |
|
50 |
|
54 |
|
58 |
|
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.