xper,xns,xew,xco
0.100000001 , 1.88072848 , 2.74744678 , 892.650024
0.200000003 , 3.30382562 , 3.79835868 , 1031.25000
0.300000012 , 4.59344673 , 2.71882129 , 1031.25000
0.500000000 , 2.70773244 , 3.65981054 , 1031.25000
1.00000000 , 1.84204102 , 1.66380894 , 562.650024
2.00000000 , 0.604310215 , 0.529594600 , 281.325012
3.00000000 , 0.144534037 , 0.142055660 , 187.688004