def METHOD_NAME(self):
    """
    Calculate and return the annual occurrence rates histogram.
    The result histogram has only one bin if minimum and maximum magnitude
    values appear equal after rounding.
    :returns:
        See :meth:
        `openquake.hazardlib.mfd.base.BaseMFD.get_annual_occurrence_rates`.
    """
    mag_rates = []
    gr_rates = self._dt_gr.METHOD_NAME()
    for mag, rate in gr_rates:
        mag_rates.append((mag, self._scale_mag_bin_rate(mag, rate)))
    return mag_rates