Exercises by Type, Age, Sex, and Race, 1985-1995. In order to eliminate differences in observed rates that result from age differences in population composition, percentages for the population 65 years and older have been age-adjusted to the 1970 U.S. civilian noninstitutionalized population.
Estimates based upon small sample sizes are unstable.
Therefore percentages based on fewer than 25 interviews are unreliable and are not shown.