An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The following software products have been developed by staff of the U.S. Census Bureau. These programs are used by researchers in statistical offices, universities, and private organizations around the world for data collection, data processing, and population analysis work. The programs are available free of charge.
Top