,AAA,AA,A,BBB,BB,B,CCC,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.986849,0.013151,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.006451,0.968852,0.024697,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.104974,0.858533,0.033497,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.017561,0.000000,0.807022,0.110507,0.012279,0.052632
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.770997,0.136058,0.092944
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.725061,0.248939
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000