,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.000000,0.499188,0.499188,0.000000,0.000000,0.001624
BBB,0.000000,0.000000,0.000000,0.586115,0.293058,0.109955,0.010872
BB,0.000000,0.000000,0.000000,0.050023,0.750000,0.149954,0.050023
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.583360,0.416640
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000