,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.043445,0.912346,0.043445,0.000000,0.000000,0.000000,0.000764
A,0.000000,0.156637,0.763344,0.058753,0.019621,0.000000,0.001646
BBB,0.000000,0.000000,0.056194,0.866145,0.067541,0.000000,0.010120
BB,0.000000,0.000000,0.000000,0.112645,0.816860,0.042272,0.028222
B,0.000000,0.000000,0.000000,0.000000,0.155851,0.779255,0.064893
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000