,AAA,AA,A,BBB,BB,B,D
AAA,0.996879,0.002609,0.000000,0.000000,0.000000,0.000000,0.000512
AA,0.005305,0.971124,0.022690,0.000140,0.000000,0.000000,0.000741
A,0.000000,0.018685,0.959782,0.018699,0.000442,0.000737,0.001655
BBB,0.000000,0.000000,0.053864,0.919788,0.010295,0.005265,0.010788
BB,0.000000,0.000000,0.000961,0.018349,0.867660,0.080888,0.032142
B,0.000000,0.000000,0.000000,0.001442,0.059834,0.762310,0.176413
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000