subtract 10%iles  0.000488758   0.00765562    0.0137143    0.0197604
    0.0266728    0.0358706    0.0507393    0.0828943     0.172503
diff 10%iles   -0.0631027   -0.0285397   -0.0157881  -0.00743103 -0.000373840
   0.00654125    0.0144196    0.0255733    0.0513763
stardiff 10%iles   -0.0349114   -0.0175113  -0.00979202  -0.00414580
  0.000808284   0.00566142    0.0109665    0.0178219    0.0308499
stardiff contour -excluded 0.005   -0.0349114    0.0308499