,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,0.000000,0.958980,0.041020,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.073398,0.871553,0.055049,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.024413,0.778901,0.000000,0.144861,0.003000,0.048825
BB,0.000000,0.000000,0.000000,0.000000,0.727283,0.204505,0.022723,0.045489
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.728591,0.128575,0.142835
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.525504,0.448496
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000