,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,0.009153,0.981694,0.009153,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.063089,0.900860,0.036051,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.029368,0.851546,0.000000,0.086718,0.003000,0.029368
BB,0.000000,0.000000,0.000000,0.058824,0.470588,0.317647,0.035294,0.117647
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.850000,0.150000,0.000000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.974000,0.000000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000