,AAA,AA,A,BBB,BB,B,D
AAA,0.999493,0.000000,0.000000,0.000000,0.000000,0.000000,0.000507
AA,0.000000,0.992788,0.006477,0.000000,0.000000,0.000000,0.000735
A,0.000000,0.008569,0.981169,0.008569,0.000000,0.000000,0.001693
BBB,0.000000,0.000000,0.000000,0.988389,0.000000,0.000000,0.011611
BB,0.000000,0.000000,0.000000,0.056153,0.870101,0.056153,0.017593
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.900026,0.099974
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000