subtract 10%iles      0.00000   0.00522399    0.0650198     0.131181
     0.215889     0.340615     0.542659     0.915331      1.82553
diff 10%iles    -0.395897    -0.169603   -0.0726547   -0.0165153      0.00000
    0.0139277    0.0679262     0.162444     0.388235
stardiff 10%iles   -0.0708643   -0.0254833  -0.00724459      0.00000
  0.000888716   0.00997271    0.0216316    0.0403205    0.0821418
stardiff contour -excluded 0.005   -0.0708643    0.0821418