Some Cubans fear that information taken by the census takers – which includes questions about the number of electronics in a home, for example – could be used by the government to target a citizen’s wealth. Others fear census takers could uncover illegal living situations, including apartments rented on the black market.
To ease these fears, the government has released statements on TV and in national press assuring Cubans the census is purely for statistics, and will not be used to prosecute anyone.
This is been the universal fear of censuses forever--that they might be used for evil, not good. History suggests, I think, that the good emanating from censuses overwhelms the bad.
Also, no matter what you may think of Castro and no matter how politically and economically oppressed Cubans may be, their basic demographics are very European. The PRB Population Data Sheet estimates that women are having 1.7 children each, and that female life expectancy is 80 years.