,AAA,AA,A,BBB,BB,B,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.007680,0.983911,0.007680,0.000000,0.000000,0.000000,0.000730
A,0.000000,0.032194,0.955430,0.010731,0.000000,0.000000,0.001644
BBB,0.000000,0.000000,0.085802,0.901066,0.000000,0.000000,0.013131
BB,0.000000,0.000000,0.000000,0.000000,0.837904,0.139651,0.022445
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.953670,0.046330
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000