subtract 10%iles -0.000627518   0.00495100   0.00952983    0.0141068
    0.0192423    0.0258260    0.0357547    0.0543919     0.105606
diff 10%iles   -0.0411472   -0.0211816   -0.0120339  -0.00546551  0.000267029
   0.00601935    0.0126128    0.0218420    0.0420343
stardiff 10%iles   -0.0231715   -0.0130632  -0.00736141  -0.00294070
   0.00103428   0.00500354   0.00942789    0.0151881    0.0257061
stardiff contour -excluded 0.005   -0.0231715    0.0257061