,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.986203,0.013062,0.000000,0.000000,0.000000,0.000735
A,0.000000,0.026261,0.972083,0.000000,0.000000,0.000000,0.001657
BBB,0.000000,0.000000,0.098979,0.890922,0.000000,0.000000,0.010099
BB,0.000000,0.000000,0.000000,0.019210,0.924308,0.038531,0.017950
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.935107,0.064893
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000