,AAA,AA,A,BBB,BB,B,D
AAA,0.999389,0.000000,0.000000,0.000000,0.000000,0.000000,0.000611
AA,0.043445,0.912346,0.000000,0.043445,0.000000,0.000000,0.000764
A,0.000000,0.131342,0.840512,0.026293,0.000000,0.000000,0.001854
BBB,0.000000,0.000000,0.121857,0.785146,0.067726,0.013596,0.011675
BB,0.000000,0.000000,0.000000,0.017244,0.844808,0.068974,0.068974
B,0.000000,0.000000,0.000000,0.000000,0.222274,0.666667,0.111059
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000