,AAA,AA,A,BBB,BB,B,CCC,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.081662,0.857174,0.040776,0.020388,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.079514,0.864444,0.053047,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.064964,0.844180,0.046711,0.005190,0.038955
B,0.000000,0.000000,0.000000,0.000000,0.083322,0.672884,0.118744,0.125050
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.066658,0.525918,0.401424
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000