,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.009257,0.980737,0.009257,0.000000,0.000000,0.000000,0.000749
A,0.000000,0.046650,0.914383,0.037342,0.000000,0.000000,0.001625
BBB,0.000000,0.000000,0.021327,0.872275,0.000000,0.063863,0.042535
BB,0.000000,0.000000,0.000000,0.000000,0.703690,0.222264,0.074046
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.909100,0.090900
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000