subtract 10%iles      0.00000   0.00615025    0.0446246    0.0845127
     0.130505     0.193585     0.291300     0.467825     0.903634
diff 10%iles    -0.279964    -0.110527   -0.0460434   -0.0104785      0.00000
   0.00996876    0.0463672     0.112632     0.285559
stardiff 10%iles   -0.0414130   -0.0138898  -0.00371867      0.00000
   0.00123412   0.00706314    0.0143065    0.0259349    0.0547974
stardiff contour -excluded 0.005   -0.0414130    0.0547974