,AAA,AA,A,BBB,BB,B,D
AAA,0.999489,0.000000,0.000000,0.000000,0.000000,0.000000,0.000511
AA,0.028946,0.970280,0.000000,0.000000,0.000000,0.000000,0.000774
A,0.000000,0.112188,0.863821,0.022458,0.000000,0.000000,0.001533
BBB,0.000000,0.000000,0.106754,0.827736,0.000000,0.053377,0.012133
BB,0.000000,0.000000,0.000000,0.000000,0.749954,0.083410,0.166636
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.857143,0.142857
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000