subtract 10%iles  -0.00711203      0.00000   0.00845337    0.0314512
    0.0606828     0.100558     0.161078     0.269433     0.550405
diff 10%iles    -0.209738   -0.0819573   -0.0347345  -0.00836682      0.00000
   0.00630140    0.0323260    0.0790825     0.207388
stardiff 10%iles   -0.0311218   -0.0105911  -0.00316972      0.00000
  0.000540256   0.00480829    0.0101515    0.0185493    0.0390528
stardiff contour -excluded 0.005   -0.0311218    0.0390528