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.
Description
Source of information
usually, how many hours a day he or she had worked as professionals (private or
Imputation and derivation
Imputation
usually, how many hours a day he or she had worked as professionals (private or
Others
Security
usually, how many hours a day he or she had worked as professionals (private or