,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.989263,0.010737,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.009179,0.986330,0.004491,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.002861,0.987801,0.009338,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.000000,0.986259,0.010745,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.019053,0.910296,0.052873,0.005875,0.011903
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.748310,0.132055,0.119636
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.691617,0.282383
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000