the number of educable ( i.q . 50-75 ) mentally retarded children aged 6-16 years in community schools rose consistently ( 92.1/100,000 population in 1954 to 190.1 in 1963 ) , while first admissions of educable mentally retarded persons aged 5-19 years to ontario hospital schools showed no consistent trend ( 2.0/100,000 in 1954 and 2.0 in 1963 ) .
C0008059
children
C0027361
persons