def get_first_years_performance(school):
    """
    Returns performance indicator for this school, as well as an indicator
    (1-5; 3 is average, 1 is worse, 5 is better) that compares the school to
    the national average.
    """
    performance = {}
    ratio = school['renondb'].strip()
    # bolletje
    compared_performance = school['renonbol'].strip()

    if ratio:
        ratio = float(ratio.replace(',', '.'))
        performance['ratio'] = ratio

    if compared_performance:
        performance['compared_performance'] = int(compared_performance)
        performance['compared_performance_category'] = school['renoncat'].strip()

    return performance