,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,0.000000,0.977808,0.022192,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.048079,0.942264,0.009657,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.000000,0.997004,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.995025,0.000000,0.004975,0.000000
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