subtract 10%iles -0.000125382      0.00000    0.0191396    0.0473304
    0.0819108     0.129940     0.204141     0.334455     0.649462
diff 10%iles    -0.248964   -0.0987434   -0.0414845   -0.0100881      0.00000
   0.00714636    0.0381641    0.0947909     0.245146
stardiff 10%iles   -0.0350016   -0.0118507  -0.00340453      0.00000
  0.000613691   0.00527843    0.0112238    0.0208149    0.0436960
stardiff contour -excluded 0.005   -0.0350016    0.0436960