,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.991147,0.008064,0.000000,0.000000,0.000000,0.000788
A,0.000000,0.032595,0.954692,0.010823,0.000000,0.000000,0.001890
BBB,0.000000,0.000000,0.051823,0.933744,0.000000,0.000000,0.014433
BB,0.000000,0.000000,0.000000,0.108559,0.868752,0.000000,0.022689
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.947403,0.052597
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000