,AAA,AA,A,BBB,BB,B,D
AAA,0.984881,0.014939,0.000000,0.000000,0.000000,0.000000,0.000180
AA,0.012431,0.966915,0.019160,0.000345,0.000192,0.000192,0.000764
A,0.000000,0.046798,0.924098,0.017846,0.000981,0.008184,0.002094
BBB,0.000000,0.000324,0.121507,0.834928,0.015282,0.011934,0.016026
BB,0.000000,0.000000,0.007813,0.059788,0.738123,0.096016,0.098260
B,0.000000,0.000000,0.000000,0.009755,0.004878,0.747686,0.237681
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000