,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,0.090874,0.818251,0.090874,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.065196,0.913072,0.021732,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.051241,0.870396,0.051241,0.011310,0.003000,0.012810
BB,0.000000,0.000000,0.000000,0.075724,0.833355,0.027238,0.003026,0.060657
B,0.000000,0.000000,0.000000,0.000000,0.181865,0.463610,0.081813,0.272712
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.145492,0.248508,0.600000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000