This was posted on another list and thought it might be helpful.  Can't recall if there was discussion on this list, however, on some of the other's the suggestion was made to make a copy of your census before mailing in to put with your genealogy info.  If you want to leave your descendants census form information from any census year you might have missed, you can find the forms and questions for all the years at: (http://usa.ipums.org/usa/voliii/tEnumForm.shtml)  I'm pretty sure that 2000 was the first year that I was ever counted in the census, but then, 1970 and 1980 are still a bit fuzzy. Nancy