,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.049942,0.949320,0.000000,0.000000,0.000000,0.000000,0.000738
A,0.000000,0.106170,0.828416,0.063724,0.000000,0.000000,0.001691
BBB,0.000000,0.000000,0.030564,0.877612,0.061259,0.010188,0.020376
BB,0.000000,0.000000,0.000000,0.095284,0.857173,0.027206,0.020337
B,0.000000,0.000000,0.000000,0.000000,0.076950,0.769149,0.153901
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000