To collect demographic information, this is the employer and the employees of the establishment of import - export.The data was collected by a questionnaire to fill out to provide samples at the establishment.
To collect data for the populations, for example, are employers and employees of the enterprises import-export. Storage process by bringing the questionnaire to a sample of the fill at the establishment.
The group will collect data in a sample population is the employer and the employees of national import-export.Information collected by the survey process to sample group, complete the information at workplace