1975's census : spreading of « large suburbs » - The preliminary results regarding legal population of each of France's administrative units elaborated within the framework of the delimitation carried out by INSEE on occasion of the census of population of 1975 show up a 10 % increase of urban population between 1968 and 1975 versus 18,4 % between 1962 ans 1968.4 A French out of two lives in an urban unit of 50 000 inhabitants , or more, a French out of five lives in provinces in an urban unity of 200 000 inhabitants or more, and a French out of six abides in the Paris concentration. The deep inflection of migration balance gave rise to the new distribution of rate of growth by category of commune. It is thus liable to establish that the mo...