// curve
// x y dy
15.700000	0.975425	0.000369
28.799999	0.976707	0.000273
49.299999	0.976982	0.000212
78.300003	0.977367	0.000171
117.099998	0.977711	0.000143
167.600006	0.978188	0.000123
234.199997	0.979032	0.000108
298.600006	0.979651	0.000105
350.600006	0.980223	0.000106