Various studies use census data. If the data were not available, we would have to collect them every time they were needed. Thus, we would have to conduct a large number of specific studies to compensate for the lack of specific census data. That would cost a fortune. The census is not an expense: it is a form of savings. Once we have the data , we can rely on them for a certain period of time because they are robust. In addition, we do not have to carry out a good number of other surveys to collect the same information. To some extent, the census results in savings for the community.
On August 27th, 2010. See this statement in context.