,AAA,AA,A,BBB,BB,B,D
AAA,0.999492,0.000000,0.000000,0.000000,0.000000,0.000000,0.000508
AA,0.000000,0.978366,0.020916,0.000000,0.000000,0.000000,0.000718
A,0.000000,0.018499,0.961406,0.018499,0.000000,0.000000,0.001596
BBB,0.000000,0.000000,0.000000,0.989740,0.000000,0.000000,0.010260
BB,0.000000,0.000000,0.000000,0.000000,0.981593,0.000000,0.018407
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.949977,0.050023
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000