,AAA,AA,A,BBB,BB,B,D
AAA,0.999491,0.000000,0.000000,0.000000,0.000000,0.000000,0.000509
AA,0.000000,0.999286,0.000000,0.000000,0.000000,0.000000,0.000714
A,0.000000,0.011102,0.942660,0.044406,0.000000,0.000000,0.001832
BBB,0.000000,0.000000,0.041136,0.946272,0.000000,0.000000,0.012591
BB,0.000000,0.000000,0.000000,0.000000,0.921949,0.057677,0.020374
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.928571,0.071429
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000