subtract 10%iles  0.000287056   0.00554180   0.00988102    0.0141873
    0.0190010    0.0250893    0.0339794    0.0497284    0.0902233
diff 10%iles   -0.0389147   -0.0201430   -0.0114946  -0.00532532  4.43459e-05
   0.00540161    0.0115509    0.0201740    0.0388947
stardiff 10%iles   -0.0225815   -0.0126950  -0.00721087  -0.00300252
  0.000761320   0.00451811   0.00870918    0.0142069    0.0243145
stardiff contour -excluded 0.005   -0.0225815    0.0243144