,AAA,AA,A,BBB,BB,B,D
AAA,0.999483,0.000000,0.000000,0.000000,0.000000,0.000000,0.000517
AA,0.000000,0.982452,0.016823,0.000000,0.000000,0.000000,0.000725
A,0.000000,0.019672,0.978671,0.000000,0.000000,0.000000,0.001657
BBB,0.000000,0.000000,0.045322,0.944085,0.000000,0.000000,0.010593
BB,0.000000,0.000000,0.000000,0.000000,0.893078,0.085272,0.021650
B,0.000000,0.000000,0.000000,0.000000,0.035528,0.910028,0.054444
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000