def remove_outliers(df):
    """
    For INS and OUTS, remove implausibly values

    :param df: dataframe
    :return: dataframe
    """
    df = df[df['INS'] < 200000]
    df = df[df['INS'] >= 0]
    df = df[df['OUTS'] < 200000]
    df = df[df['OUTS'] >= 0]
    return df