,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.007468,0.991792,0.000000,0.000000,0.000000,0.000000,0.000740
A,0.000000,0.009504,0.941275,0.047522,0.000000,0.000000,0.001699
BBB,0.000000,0.000000,0.065762,0.920217,0.000000,0.000000,0.014021
BB,0.000000,0.000000,0.000000,0.000000,0.905633,0.069735,0.024633
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.944474,0.055526
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000