,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,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.046680,0.897199,0.056120,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.062456,0.809750,0.093571,0.000000,0.002996,0.031228
BB,0.000000,0.000000,0.000000,0.000000,0.857143,0.128571,0.014286,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.566667,0.100000,0.333333
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.374000,0.600000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000