,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.084987,0.700882,0.127423,0.000000,0.084987,0.001722
BBB,0.000000,0.000000,0.067013,0.804742,0.050348,0.067013,0.010884
BB,0.000000,0.000000,0.000000,0.122427,0.815744,0.040852,0.020977
B,0.000000,0.000000,0.000000,0.000000,0.199946,0.700014,0.100041
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000