,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,0.000000,0.983949,0.016051,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.000000,0.973904,0.026096,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.142586,0.854418,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.842158,0.094705,0.010523,0.052614
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.743710,0.131243,0.125047
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.676804,0.297196
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000