,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,0.000000,0.064570,0.913944,0.021486,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.125019,0.790083,0.000000,0.081898,0.003000,0.000000
BB,0.000000,0.000000,0.000000,0.153054,0.841971,0.000000,0.004975,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.047675,0.526185,0.092856,0.333284
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.038140,0.355860,0.600000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000