,AAA,AA,A,BBB,BB,B,D
AAA,0.999475,0.000000,0.000000,0.000000,0.000000,0.000000,0.000525
AA,0.000000,0.958273,0.040989,0.000000,0.000000,0.000000,0.000738
A,0.000000,0.073284,0.870198,0.054963,0.000000,0.000000,0.001554
BBB,0.000000,0.000000,0.024413,0.780401,0.000000,0.146361,0.048825
BB,0.000000,0.000000,0.000000,0.000000,0.727283,0.227228,0.045489
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.857165,0.142835
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000