def available_through_years(available_year_list, start_year):
    """Return a list of available through/ending years that are >= the start year.

    :param available_year_list:            List of available years from the input file
    :type available_year_list:             list

    :param start_year:                     The start year chosen
    :type start_year:                      int

    :return:                               list of available through/ending years

    """

    # Construct options for drop down based on input parameters
    options = []
    for i in available_year_list:
        if int(i['value']) >= int(start_year):
            options.append(i)
    return options