,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.997390,0.002610,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.005308,0.971845,0.022707,0.000140,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.018709,0.961237,0.018726,0.000443,0.000738,0.000000,0.000148
BBB,0.000000,0.000000,0.054288,0.926175,0.010365,0.004800,0.002997,0.001374
BB,0.000000,0.000000,0.000961,0.018349,0.881175,0.073681,0.009845,0.015990
B,0.000000,0.000000,0.000000,0.001442,0.059834,0.665919,0.117515,0.155290
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.054534,0.617403,0.322063
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000