Level and year or grade of school in which enrolled
Persons enrolled in school were asked the year or grade in which enrolled up to 6 or more years of college. In 1960, enrollment was classified into four levels with separate years or grades identified within each level as indicated below. In 1970, enrollment is classified as in 1960 with the addition of nursery school.
Identified in 1970, but not in 1960.
Includes grades 1 through 8, identified separately in some tabulations. (Persons enrolled in a junior high school are classified as enrolled in elementary school or high school according to year in which enrolled.)
Includes grades 9 through 12, identified separate] y in some tabulations. (See elementary school, above, for treatment of junior high school enrollment.)
Includes 1 through 5 academic years and 6 years or more, identified separately in some tabulations. College enrollment is defined to include enrollment in junior or community colleges, regular 4-year colleges, and graduate or professional schools.