During 2010-2012,the percentage of adults aged 18 years and older who had no natural teeth was higher in nonmetropolitan areas than in metropolitan areas for all age groups. The percentage of adults with no natural teeth also increased steadily with age in metropolitan and nonmetropolitan locations. Among persons aged 85 years and older in nonmetropolitan locations, 40% had lost all their natural teeth, and compared with 31% of those in metropolitan areas. Among adults aged 18-44 years,the percentages were 3.8% in nonmetropolitan areas and 2.1% in metropolitan areas.
Source: cdc.gov