Criticizing immigration and taking advantage of the economic crisis striking France and the world since the 1973 oil crisis, Le Pen's party managed to increase its support in the 1980s, starting in the municipal elections of 1983. His popularity has been greatest in the south and east of France. The FN obtained 16 seats in the 1984 European elections. A total of 35 FN deputies entered the Assembly after the 1986 elections (the only legislative elections held under proportional representation), which were won by the right wing, bringing Jacques Chirac to Matignon in the first cohabitation government (that is, the combination of a right-wing Prime minister, Chirac, with a socialist President, Mitterrand). In Paris, Jean-Marie Le Pen was elected in the National Assembly.