,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,0.076940,0.897450,0.025609,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.037071,0.944394,0.018535,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.158273,0.826515,0.012216,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.714339,0.257095,0.028566,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.850000,0.150000,0.000000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.974000,0.000000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000