subtract 10%iles  -0.00291800   0.00182152   0.00577736    0.0100098
    0.0147762    0.0205259    0.0284576    0.0422554    0.0807285
diff 10%iles   -0.0437460   -0.0216827   -0.0120234  -0.00517273  0.000761509
   0.00669050    0.0134711    0.0229397    0.0436535
stardiff 10%iles   -0.0235370   -0.0125906  -0.00665268  -0.00217602
   0.00174112   0.00563012   0.00993913    0.0155663    0.0257424
stardiff contour -excluded 0.005   -0.0235370    0.0257424