,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,0.039636,0.949612,0.010752,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.150519,0.849481,0.000000,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.099090,0.862331,0.009213,0.017425,0.002999,0.008942
BB,0.000000,0.000000,0.052771,0.113733,0.697852,0.102932,0.013095,0.019616
B,0.000000,0.000000,0.000000,0.000000,0.013320,0.822017,0.145062,0.019601
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.023990,0.921009,0.049001
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000