,AAA,AA,A,BBB,BB,B,D
AAA,0.999825,0.000000,0.000000,0.000000,0.000000,0.000000,0.000175
AA,0.006134,0.973323,0.019797,0.000000,0.000000,0.000000,0.000745
A,0.000000,0.060975,0.894681,0.042767,0.000000,0.000000,0.001577
BBB,0.000000,0.000000,0.025036,0.835241,0.000000,0.099481,0.040243
BB,0.000000,0.000000,0.000000,0.019608,0.633854,0.267478,0.079061
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.898849,0.101151
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000