Friday, April 16, was the deadline to get census forms in the mail.
Households that have not sent it in yet can expect to get a visit from a census taker.
"This is the end of the first phase of the 2010 census," Dr. Robert Groves, director of the U.S. Census Bureau, said. "By that we mean that if you get it in the mail stream by April 16, you have very high assurance that no one will follow up, no census taker will knock on your door to collect the information."
"Past that date, we're still taking in forms," he added. "But then because of the logistics of working out census takers visiting neighborhoods, we can't promise that somebody may not, may call on your house to follow up."
Sending in the forms could save the government money as more than $1 billion if every household turned theirs in.
In 2000, 72 percent of Americans participated.
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