,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,0.000000,0.988889,0.011111,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.024003,0.972968,0.003029,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.056490,0.932766,0.007749,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.006520,0.938149,0.049798,0.005533,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.832292,0.146875,0.020833
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.921917,0.052083
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000