,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.128922,0.676947,0.193383,0.000000,0.000000,0.000000,0.000748
A,0.000000,0.020392,0.937141,0.040784,0.000000,0.000000,0.001682
BBB,0.000000,0.000000,0.052759,0.910283,0.026436,0.000000,0.010523
BB,0.000000,0.000000,0.035714,0.107143,0.607143,0.214286,0.035714
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.923012,0.076988
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000