,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.995674,0.004326,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.008638,0.970505,0.020436,0.000421,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.046355,0.922115,0.027547,0.001328,0.002213,0.000000,0.000443
BBB,0.000000,0.000000,0.067727,0.879654,0.031095,0.014401,0.003000,0.004122
BB,0.000000,0.000000,0.002883,0.055046,0.796592,0.087759,0.009751,0.047969
B,0.000000,0.000000,0.000000,0.004327,0.012835,0.722757,0.127545,0.132535
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.010268,0.617541,0.366190
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000