,AAA,AA,A,BBB,BB,B,CCC,D
AAA,0.833333,0.166667,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.933333,0.066667,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.061773,0.737460,0.117262,0.000000,0.083505,0.000000,0.000000
BBB,0.000000,0.000000,0.062378,0.797521,0.062053,0.075048,0.003000,0.000000
BB,0.000000,0.000000,0.000000,0.134711,0.796350,0.062045,0.006894,0.000000
B,0.000000,0.000000,0.000000,0.023801,0.090450,0.592972,0.104642,0.188136
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.079026,0.452999,0.461975
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000