,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,0.009656,0.990344,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.104447,0.876365,0.019188,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.068251,0.856864,0.000000,0.071886,0.003000,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.672167,0.165050,0.018339,0.144445
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.738601,0.130341,0.131057
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.646357,0.327643
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000