,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,0.007474,0.992526,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.009521,0.942877,0.047603,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.066597,0.930407,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.928504,0.064346,0.007150,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.802803,0.141671,0.055526
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.835184,0.138816
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000