,AAA,AA,A,BBB,BB,B,CCC,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.973016,0.026984,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.009773,0.970572,0.019655,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.000000,0.997004,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.995025,0.000000,0.004975,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.166667,0.425000,0.075000,0.333333
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.133333,0.260667,0.600000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000