,AAA,AA,A,BBB,BB,B,D
AAA,0.999459,0.000000,0.000000,0.000000,0.000000,0.000000,0.000541
AA,0.000000,0.999250,0.000000,0.000000,0.000000,0.000000,0.000750
A,0.000000,0.021696,0.803076,0.086783,0.000000,0.086783,0.001662
BBB,0.000000,0.000000,0.078530,0.722364,0.094236,0.094236,0.010632
BB,0.000000,0.000000,0.000000,0.100606,0.804968,0.075425,0.019001
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.749963,0.250037
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000