PNG IHDR t sBIT|d pHYs a a?i 8tEXtSoftware matplotlib version3.2.0, http://matplotlib.org/y IDATxy|M $$bJ1JĬP<5f^c ЪjjKEkjbH" wuzN"Q<*kgh|:e2@DDDDDDDDDDDCf """"""""""