The 2010 Census is a count of everyone living in the United States and is mandated by the U.S. Constitution. Census data guide the distribution of more than $400 billion in federal funds to local, state and tribal governments each year. They're also used to determine Congressional apportionment and to help guide planning decisions, such as the placement of schools, hospitals, transportation, and business and industrial development. The 2010 Census questionnaire will be one of the shortest in history, consisting of 10 questions and taking about 10 minutes to complete. Strict laws protect the confidentiality of respondents and the information they provide.