PNG IHDR t sBIT|d pHYs a a?i 8tEXtSoftware matplotlib version3.2.1, http://matplotlib.org/: IDATxwxDPRb%5+](Z|(5֦--~R{LZQ%Ħupuz8Q}=+g>wzc2@DDDDDDDDDDDCf """"""""""