subtract 10%iles      0.00000      0.00000    0.0226240    0.0515671
    0.0862989     0.131793     0.198472     0.315515     0.604673
diff 10%iles    -0.229825   -0.0919609   -0.0391233  -0.00858951      0.00000
   0.00853896    0.0381956    0.0898173     0.226761
stardiff 10%iles   -0.0318279   -0.0107444  -0.00286072      0.00000
  0.000961065   0.00544268    0.0109553    0.0196577    0.0406116
stardiff contour -excluded 0.005   -0.0318279    0.0406116