What was the average validity, in months, of the permits obtained in the last two years?
Categories
Value
Category
-9
don't know
-5
termless
1
less than one month
2
3
6
10
12
18
24
30
36
60
120
365
730
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.