,AAA,AA,A,BBB,BB,B,D
AAA,0.999475,0.000000,0.000000,0.000000,0.000000,0.000000,0.000525
AA,0.000000,0.992240,0.007042,0.000000,0.000000,0.000000,0.000718
A,0.000000,0.020189,0.978146,0.000000,0.000000,0.000000,0.001666
BBB,0.000000,0.000000,0.053517,0.936556,0.000000,0.000000,0.009927
BB,0.000000,0.000000,0.000000,0.000000,0.950993,0.031685,0.017322
B,0.000000,0.000000,0.000000,0.000000,0.058847,0.882305,0.058847
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000