,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,0.006139,0.974049,0.019812,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.061071,0.896095,0.042834,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.025036,0.833740,0.000000,0.097981,0.003000,0.040243
BB,0.000000,0.000000,0.000000,0.019608,0.633854,0.240730,0.026748,0.079061
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.783775,0.138313,0.077912
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.779051,0.194949
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000