,AAA,AA,A,BBB,BB,B,D
AAA,0.999490,0.000000,0.000000,0.000000,0.000000,0.000000,0.000510
AA,0.000000,0.999261,0.000000,0.000000,0.000000,0.000000,0.000739
A,0.000000,0.069179,0.919290,0.000000,0.000000,0.009928,0.001603
BBB,0.000000,0.000000,0.054054,0.891892,0.027027,0.000000,0.027027
BB,0.000000,0.000000,0.000000,0.000000,0.973912,0.000000,0.026088
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.875014,0.124986
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000