def _get_poverty_statistics(dataframe, state_code, county_code):
    """
    Calculates poverty-rate of people living below certain threshold
    
    :param dataframe: Containing poverty data
    
    :param int state_code: 
    
    :param int county_code: 
    
    :return float:
    
    """
    dataframe.columns = ['STATE', 'COUNTY', 'NAME', 'POV']
    df = dataframe[dataframe.STATE == int(state_code)]
    if len(df) > 0:
        df = df[df.COUNTY == int(county_code)]
        return float(df['POV'].values[0])
    else:
        return 0
