,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,0.002491,0.997509,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.006881,0.945764,0.047356,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.036065,0.960939,0.000000,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.000000,0.000000,0.954884,0.039112,0.006004,0.000000
B,0.000000,0.000000,0.000000,0.000000,0.037033,0.782552,0.138097,0.042318
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.042959,0.845245,0.105796
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000