POPULATION ESTIMATES FOR PEOPLE WITH
DEVELOPMENTAL DISABILITIES
lEstimates are 2-3% of Total US Population.
lNumber is Increasing Nationally Including Population
in Washington State.
lMean Age at Death for Persons with Mental Retardation was 19 Years
in 1930s;
59 Years in 1970s; and 66 Years in 1993: This Population is
Aging.
NOTE: mean age at death for the
general population in 1993 was 70 years.