In the 1980s, advertising revenues accounted for approximately 40% of operating profits of a typical local newspaper; in the 1990s, this proportion increased to 57%. A newspaper; in the 1990s this proportion increased to 57%. B newspaper; in the 1990s they increased by 57%. C newspaper, in the 1990s they increased to 57%. D newspaper; increasing to 57% in the 1990s. E newspaper, which increased to 57% in the 1990s