Returns the range of years available from RIDE. The RIDE Data Center
provides October 1st enrollment headcounts with data going back to 2010-11.
Value
Integer vector of available end years
Examples
get_available_years()
#> [1] 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
#> [16] 2026