,AAA,AA,A,BBB,BB,B,D
AAA,0.999644,0.000000,0.000000,0.000000,0.000000,0.000000,0.000356
AA,0.039606,0.948886,0.010743,0.000000,0.000000,0.000000,0.000764
A,0.000000,0.150281,0.848139,0.000000,0.000000,0.000000,0.001580
BBB,0.000000,0.000000,0.098944,0.861139,0.009157,0.018314,0.012446
BB,0.000000,0.000000,0.052306,0.112803,0.694598,0.114369,0.025923
B,0.000000,0.000000,0.000000,0.000000,0.012747,0.953307,0.033946
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000