,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.992478,0.006766,0.000000,0.000000,0.000000,0.000756
A,0.000000,0.000000,0.979219,0.009547,0.000000,0.009547,0.001687
BBB,0.000000,0.000000,0.098854,0.889686,0.000000,0.000000,0.011460
BB,0.000000,0.000000,0.000000,0.000000,0.894255,0.074602,0.031143
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.913098,0.086902
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000