When the second Yugoslavia was formed in 1945, the Communists who led the Partisans during the war formed the new régime. They recognised, sanctioned, and fostered a national identity of Montenegrins as a people distinct from the Serbs and other South Slavs. The number of people who were registered as Montenegrins in Montenegro was 90% in 1948; it had been dropping since, to 62% in 1991. With the rise of Serbian nationalism in the late 80's the number of citizens who declared themselves Montenegrin dropped sharply from 61.7%, in the 1991 census, to 43.16% in 2003. For a detailed overview of these trends, see the Demographic history of Montenegro.