Cumulative dropout rates= 1 - (1 - annual rate)^4. This formula applies the annual rate to a progressively declining base population. The cumulative rate represents the percentage of current students who will early exit or drop out before reaching graduation if the annual rate does not change.
The annual dropout rate is the percent of early exit non-graduates who
were not identified as either passing the General Educational
Development (GED) test or enrolled in college. The definition excludes
students who were homeschooled, suspended, temporarily expelled, truant,
incarcerated, or who completed a high school program (diploma or
certificate), transferred to another high school, or died. The rate is
calculated by dividing the number of students who dropped out before
graduation by the October 1 enrollment count plus students who dropped
out before October 1.
New Hampshire Department of Education
Data not displayed for districts/schools with fewer than five reported student dropouts.