// ridge yield from fit
// x y dy y+ y-
7.500000	0.188352	0.005253	0.031941	0.335856
22.500000	0.086294	0.005237	0.006616	0.207819
37.500000	0.011616	0.006429	-0.018902	0.035681
52.500000	-0.001125	0.004782	-0.001905	-0.000774
67.500000	-0.004806	0.007442	0.004262	-0.006403
82.500000	-0.108126	0.179847	0.019928	-0.008288