,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,0.000000,0.979069,0.020931,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.019653,0.980347,0.000000,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.000000,0.997004,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.931002,0.062098,0.006900,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.050023,0.807480,0.142497,0.000000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.040018,0.953982,0.000000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000