,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,0.000000,0.993518,0.006482,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.008584,0.982833,0.008584,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.000000,0.997004,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.057159,0.885682,0.051443,0.005716,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.765022,0.135004,0.099974
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.724065,0.249935
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000