,AAA,AA,A,BBB,BB,B,D
AAA,0.999658,0.000000,0.000000,0.000000,0.000000,0.000000,0.000342
AA,0.000000,0.996055,0.003191,0.000000,0.000000,0.000000,0.000754
A,0.000000,0.045282,0.890911,0.057354,0.000000,0.000000,0.006454
BBB,0.000000,0.000000,0.044093,0.854763,0.078891,0.000000,0.022252
BB,0.000000,0.000000,0.000000,0.000000,0.872318,0.046550,0.081132
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.620364,0.379636
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000