,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.285700,0.571400,0.142900,0.000000,0.000000,0.000000
A,0.000000,0.000000,0.540767,0.457546,0.000000,0.000000,0.001686
BBB,0.000000,0.000000,0.000000,0.714101,0.219705,0.054987,0.011208
BB,0.000000,0.000000,0.000000,0.047639,0.333333,0.380972,0.238056
B,0.000000,0.000000,0.000000,0.000000,0.133325,0.600024,0.266651
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000