from datetime import datetime


def get_month_options(year):
    """
    Get the month options for the given year.

    For the previous year, there is data available for each individual month.
    However, for previous years only the aggregate statistics is available.

    Parameters:
        year: (int): The year for which the months will be listed.
    """
    previous_year = datetime.now().year - 1
    if year == previous_year:
        return list(range(1, 13))
    return []