Get valid enrollment years

Returns a vector of school years for which enrollment data is available.

Usage

get_valid_years()

Value

Vector of valid end years

Details

Data availability by year:

• 2016-2018: Enrollment by grade only (no demographic subgroups)

• 2019-2023: Full 40D subgroup enrollment data

• 2024: 80D data only (grade counts by district, no subgroups)

• 2025: Full 40D subgroup enrollment data