,AAA,AA,A,BBB,BB,B,CCC,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.979737,0.020263,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.018174,0.972739,0.009087,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.069630,0.904128,0.023246,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.911742,0.079432,0.008826,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.850000,0.150000,0.000000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.974000,0.000000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000