Recent studies have also shown that the proportion of Paris housing occupied by low-income Parisians did not decrease under Haussmann, and that the poor were not driven out of Paris by Haussmann's renovation. In 1865 a survey by the prefecture of Paris showed that 780,000 Parisians, or 42 percent of the population, did not pay taxes due to their low income. Another 330,000 Parisians or 17 percent, paid less than 250 francs a month rent. Thirty-two percent of the Paris housing was occupied by middle-class families, paying rent between 250 and 1500 francs. Fifty thousand Parisians were classified as rich, with rents over 1500 francs a month, and occupied just three percent of the residences.