,AAA,AA,A,BBB,BB,B,D
AAA,0.999492,0.000000,0.000000,0.000000,0.000000,0.000000,0.000508
AA,0.000000,0.978366,0.020916,0.000000,0.000000,0.000000,0.000718
A,0.000000,0.019621,0.978733,0.000000,0.000000,0.000000,0.001646
BBB,0.000000,0.000000,0.000000,0.989231,0.000000,0.000000,0.010769
BB,0.000000,0.000000,0.000000,0.000000,0.915777,0.067869,0.016354
B,0.000000,0.000000,0.000000,0.000000,0.047737,0.906569,0.045694
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000