,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,0.028968,0.971032,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.112361,0.865147,0.022493,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.108065,0.836402,0.000000,0.052533,0.003000,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.749954,0.075069,0.008341,0.166636
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.728571,0.128571,0.142857
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.616857,0.357143
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000