,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.983300,0.016700,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.020358,0.948998,0.030644,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.047580,0.901844,0.047580,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.900042,0.089962,0.009996,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.743787,0.131257,0.124956
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.661609,0.312391
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000