,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.576715,0.338615,0.084670,0.000000,0.000000,0.000000
A,0.000000,0.000000,0.558401,0.439905,0.000000,0.000000,0.001694
BBB,0.000000,0.000000,0.017374,0.694019,0.205669,0.072355,0.010583
BB,0.000000,0.000000,0.000000,0.068283,0.515874,0.272203,0.143640
B,0.000000,0.000000,0.000000,0.000000,0.044442,0.561128,0.394430
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000