Censuses provide population numbers, household or family size and composition, and information on sex and age distribution. They often include other demographic, economic and health-related topics as well. The 1999 Vietnam de jure census collected data through direct enumeration on the subjects of housing, household demographics, employment for those 13 and older, education, household deaths, and fertility for women 15 and older. The majority of the population was enumerated through the short form questionnaire while 3% of the population answered the long form questionnaire. The census day was April 1, 1999.