Citations for statistics should enable your readers to locate the table or data that you have used in your assignment or paper. At a minimum, a citation should include:
creator of the data (often an organization or government agency)
date of publication
where it was published
date that you accessed the data, only if significant (i.e., data is updated without adjustment to publication date)
Refer to your style manual, ask a librarian, or confer with your professor if your specific data set does not contain the elements needed to draft a useful citation.