,AAA,AA,A,BBB,BB,B,D
AAA,0.999492,0.000000,0.000000,0.000000,0.000000,0.000000,0.000508
AA,0.000000,0.979560,0.019697,0.000000,0.000000,0.000000,0.000743
A,0.000000,0.031319,0.948558,0.018531,0.000000,0.000000,0.001592
BBB,0.000000,0.000000,0.000000,0.974538,0.015001,0.000000,0.010460
BB,0.000000,0.000000,0.000000,0.000000,0.981982,0.000000,0.018018
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.950001,0.049999
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000