,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,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.073416,0.926584,0.000000,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.049914,0.947090,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.995025,0.000000,0.004975,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.680000,0.120000,0.200000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.474000,0.500000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000