xper,xns,xew,xco
0.100000001 , 9.26465034 , 6.16983271 , 811.500000
0.200000003 , 7.56471062 , 15.3400736 , 937.500000
0.300000012 , 5.08633041 , 6.03492117 , 937.500000
0.500000000 , 2.46728230 , 1.81226516 , 750.000000
1.00000000 , 0.793309391 , 0.533107996 , 375.000000
2.00000000 , 0.307686478 , 0.120731078 , 187.500000
3.00000000 , 0.154158831 , 3.92044708E-02 , 108.375000