In March of 2010, census forms will be delivered to every residence in the United States and Puerto Rico. When you receive yours, just answer the 10 short questions and then mail the form back in the postage-paid envelope provided. The information affects the numbers of seats our state occupies in the U.S. House of Representatives. And people from many walks of life use census data to advocate for causes, prevent diseases, research markets, locate pools of skilled workers and more.