subtract 10%iles -0.000759125   0.00753307    0.0149574    0.0230312
    0.0328739    0.0463095    0.0669804     0.104748     0.201900
diff 10%iles   -0.0874867   -0.0396528   -0.0208759  -0.00917625  0.000424385
    0.0100071    0.0216699    0.0403230    0.0877209
stardiff 10%iles   -0.0290635   -0.0152492  -0.00811049  -0.00271844
   0.00207899   0.00687413    0.0122468    0.0194036    0.0333212
stardiff contour -excluded 0.005   -0.0290635    0.0333211