xper,xns,xew,xco
0.100000001 , 1.88103426 , 2.74762344 , 892.650024
0.200000003 , 3.30351305 , 3.79817820 , 1031.25000
0.300000012 , 4.59315395 , 2.71899605 , 1031.25000
0.500000000 , 2.70729637 , 3.65945625 , 1031.25000
1.00000000 , 1.84162140 , 1.66399908 , 562.650024
2.00000000 , 0.604710817 , 0.529789150 , 281.325012
3.00000000 , 0.144914865 , 0.141863987 , 187.688004