The census is going all year long.
I filled out the # of people living at my place and sent in the form. SInce then I've recieved several visits from a census worker, all of them when nobody was home. He always left a slip with his contact info and the time and date he stopped by. Finally the visits stopped, I guess when they realized we weren't playing ball.
I had someone explain the census situation to me in an interesting way: If you went to Burger King and ordered your Whopper value meal, and just before ringing you up the cashier asked, "And your occupation, ethnicity and social security number, sir...?" would you give it to them? Probably not. Yet millions of people are doing exactly that this year.
Think about it, who works at Burger King? Someone without a college degree or any kind of special qualifications or certifications, someone who is given the bare minimum amount of training in order to do their job, and someone who won't be employed there for a long amount of time. These are the exact same characteristics of the vast majority of census workers. So when you give the census worker your sensitive personal information, you might as well give it to the mouth-breathing slob behind the counter at Burger King, because that's the type of person who you're giving it to anyway.