From the following list, what is the main transportation obstacle by air?
Categories
Value
Category
-9
dont know
-7
doest not apply
1
airfrieght capacity
2
frequency of air traffic
3
quality of airfreight
4
distance to airport
5
custom to nepal airports
6
time/distance to market
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.