 In 1968, abortion by the instillation of saline solution accounted for 28% of those procedures performed legally in San Francisco, California.Intrauterine instillation (of all kinds) declined from 10.4% of all legal abortions in the U.S. in 1972 to 1.7% in 1985, falling to 0.8% of the total incidence of induced abortion in the United States during 2002, and 0.1% in 2007.In a 1998 Guttmacher Institute survey, sent to hospitals in Ontario, Canada, 9% of those hospitals in the province which offered abortion services used saline instillations, 4% used urea, and 25% used prostaglandin.