,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.002560,0.989024,0.007664,0.000000,0.000000,0.000000,0.000752
A,0.000000,0.031976,0.955626,0.010632,0.000000,0.000000,0.001766
BBB,0.000000,0.000000,0.069339,0.916471,0.000000,0.000000,0.014191
BB,0.000000,0.000000,0.000000,0.036186,0.895470,0.046550,0.021793
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.951458,0.048542
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000