,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.992013,0.007248,0.000000,0.000000,0.000000,0.000739
A,0.000000,0.031140,0.956755,0.010341,0.000000,0.000000,0.001765
BBB,0.000000,0.000000,0.070391,0.914601,0.000000,0.000000,0.015008
BB,0.000000,0.000000,0.000000,0.000000,0.979755,0.000000,0.020245
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.953302,0.046698
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000