from datetime import datetime


def last_30_years() -> list:
    """
    Return a list of the last 30 years. Will actually return
    values for the last 31 years.

    Returns:
        (list): List strings representing the last 31 years.
    """
    this_year = datetime.now().year
    return [str(year) for year in range(this_year-31, this_year+1)]