,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,0.000000,0.983165,0.016835,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.019705,0.980295,0.000000,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.045741,0.951264,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.903741,0.077251,0.008583,0.010425
B,0.000000,0.000000,0.000000,0.000000,0.036290,0.785823,0.138675,0.039213
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.035699,0.872423,0.085878
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000