The race riot of 1967, a result of years of segregation in Detroit, only exacerbated the phenomenon of white flight. One of the major consequences of white flight was the commercial vacuum that it created. The city lost a great deal of tax revenue, and many neighborhoods lost valuable commercial centers and markets, contributing to a vicious cycle of disinvestment and population decline. By 1980, not only did black people make up over 60% of the population, but the population of Detroit as a whole had decreased by 20% since its height in 1950. This trend of population decline did not change in the following 30 years, and by 2010, the population of Detroit had decreased by about 60%. While Detroit had been in the top ten most populous cities in the United States between 1910 and the 2000-2009 decade, given its population decline between 2000 and 2010, Detroit ranked as the 18th-most populous city in the United States in 2010.