subtract 10%iles  -0.00127506   0.00634193    0.0131450    0.0206656
    0.0299845    0.0428050    0.0626407    0.0989294     0.193590
diff 10%iles   -0.0958629   -0.0413284   -0.0210683  -0.00914693  0.000294685
   0.00972772    0.0216455    0.0418854    0.0966206
stardiff 10%iles   -0.0284888   -0.0142405  -0.00736667  -0.00237582
   0.00201205   0.00642496    0.0114960    0.0185699    0.0331876
stardiff contour -excluded 0.005   -0.0284888    0.0331876