,AAA,AA,A,BBB,BB,B,D
AAA,0.999484,0.000000,0.000000,0.000000,0.000000,0.000000,0.000516
AA,0.023201,0.929500,0.046514,0.000000,0.000000,0.000000,0.000785
A,0.000000,0.036331,0.943569,0.018165,0.000000,0.000000,0.001935
BBB,0.000000,0.000000,0.167524,0.807337,0.015249,0.000000,0.009890
BB,0.000000,0.000000,0.000000,0.000000,0.770329,0.192525,0.037146
B,0.000000,0.000000,0.000000,0.000000,0.104777,0.838490,0.056732
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000