subtract 10%iles  0.000424147    0.0292730    0.0567269    0.0864236
     0.120819     0.163557     0.220888     0.307526     0.482132
diff 10%iles    -0.198332    -0.101421   -0.0557954   -0.0248413  0.000940323
    0.0267415    0.0576439     0.102976     0.198873
stardiff 10%iles   -0.0462514   -0.0226946   -0.0108996  -0.00253953
   0.00460914    0.0116708    0.0196831    0.0305691    0.0511396
stardiff contour -excluded 0.005   -0.0462514    0.0511396