,AAA,AA,A,BBB,BB,B,D
AAA,0.999492,0.000000,0.000000,0.000000,0.000000,0.000000,0.000508
AA,0.000000,0.938943,0.060299,0.000000,0.000000,0.000000,0.000758
A,0.000000,0.036379,0.918148,0.036379,0.000000,0.000000,0.009095
BBB,0.000000,0.000000,0.065907,0.725552,0.131929,0.065907,0.010705
BB,0.000000,0.000000,0.000000,0.000000,0.927875,0.054581,0.017545
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.936210,0.063790
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000