,AAA,AA,A,BBB,BB,B,D
AAA,0.995984,0.003502,0.000000,0.000000,0.000000,0.000000,0.000515
AA,0.007282,0.971292,0.020684,0.000000,0.000000,0.000000,0.000742
A,0.000000,0.000000,0.989378,0.008961,0.000000,0.000000,0.001661
BBB,0.000000,0.000000,0.094322,0.895623,0.000000,0.000000,0.010055
BB,0.000000,0.000000,0.000000,0.000000,0.835008,0.145154,0.019838
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.936628,0.063372
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000