S0(x) = 5.288 + 1.86839*(x-x0) + -0.134333*(x-x0)^2 + 0.0108147*(x-x0)^3
S1(x) = 9.4 + 1.09976*(x-x1) + -0.0506274*(x-x1)^2 + 0.0022672*(x-x1)^3
S2(x) = 13.84 + 0.779365*(x-x2) + -0.0172996*(x-x2)^2 + 0.000322839*(x-x2)^3
S3(x) = 20.2 + 0.510954*(x-x3) + -0.00766288*(x-x3)^2 + 8.98886e-005*(x-x3)^3
S4(x) = 24.9 + 0.371499*(x-x4) + -0.00477746*(x-x4)^2 + 2.99777e-005*(x-x4)^3
S5(x) = 28.44 + 0.277276*(x-x5) + -0.00379089*(x-x5)^2 + 4.68362e-005*(x-x5)^3
S6(x) = 31.1 + 0.193908*(x-x6) + -0.00224108*(x-x6)^2 + 1.3344e-005*(x-x6)^3
S7(x) = 35 + 0.0999022*(x-x7) + -0.0011462*(x-x7)^2 + 2.84831e-006*(x-x7)^3
S8(x) = 36.9 + 0.0304006*(x-x8) + -0.000918908*(x-x8)^2 + 4.29491e-006*(x-x8)^3
S9(x) = 36.6 + -0.025109*(x-x9) + -0.000248903*(x-x9)^2 + -1.51489e-007*(x-x9)^3
S10(x) = 34.6 + -0.0565142*(x-x10) + -0.000272535*(x-x10)^2 + 5.95119e-007*(x-x10)^3
S11(x) = 31 + -0.0815373*(x-x11) + -0.000179518*(x-x11)^2 + 3.26061e-007*(x-x11)^3
S12(x) = 26.34 + -0.0984261*(x-x12) + -0.000128848*(x-x12)^2 + 1.10039e-007*(x-x12)^3
S13(x) = 20.9 + -0.111143*(x-x13) + -0.000111715*(x-x13)^2 + -2.20186e-007*(x-x13)^3
S14(x) = 14.8 + -0.126591*(x-x14) + -0.000145998*(x-x14)^2 + -4.70331e-007*(x-x14)^3
S15(x) = 7.8 + -0.151047*(x-x15) + -0.000218946*(x-x15)^2 + -1.40951e-006*(x-x15)^3
S16(x) = 3.7 + -0.172536*(x-x16) + -0.000328888*(x-x16)^2 + 4.48561e-005*(x-x16)^3
S17(x) = 1.5 + -0.13349*(x-x17) + 0.0014205*(x-x17)^2 + 8.88974e-005*(x-x17)^3