,AAA,AA,A,BBB,BB,B,D
AAA,0.999493,0.000000,0.000000,0.000000,0.000000,0.000000,0.000507
AA,0.000000,0.972295,0.026964,0.000000,0.000000,0.000000,0.000741
A,0.000000,0.009757,0.968974,0.019623,0.000000,0.000000,0.001646
BBB,0.000000,0.000000,0.000000,0.988540,0.000000,0.000000,0.011460
BB,0.000000,0.000000,0.000000,0.000000,0.971380,0.000000,0.028620
B,0.000000,0.000000,0.000000,0.000000,0.166667,0.500000,0.333333
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000