,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,0.107174,0.678587,0.214238,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.117594,0.843171,0.039236,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.051660,0.910955,0.034389,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.081633,0.734694,0.128571,0.014286,0.040816
B,0.000000,0.000000,0.000000,0.000000,0.125000,0.531250,0.093750,0.250000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.100000,0.294000,0.600000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000