,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,0.000000,0.021732,0.804413,0.086928,0.000000,0.086928,0.000000,0.000000
BBB,0.000000,0.000000,0.079374,0.728627,0.095249,0.093749,0.003000,0.000000
BB,0.000000,0.000000,0.000000,0.102555,0.820559,0.069197,0.007689,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.637468,0.112494,0.250037
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