,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.988467,0.011533,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.992525,0.007475,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.023329,0.956611,0.020060,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.057312,0.907983,0.031709,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.844864,0.079973,0.010544,0.064618
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.726629,0.128229,0.145142
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.609263,0.364737
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000