subtract 10%iles -0.000575185      0.00000    0.0195212    0.0494342
    0.0853281     0.132735     0.202123     0.322906     0.618288
diff 10%iles    -0.237311   -0.0955496   -0.0408542  -0.00911999      0.00000
   0.00864077    0.0394447    0.0933018     0.235052
stardiff 10%iles   -0.0343038   -0.0115974  -0.00307506      0.00000
   0.00101322   0.00577587    0.0116404    0.0208840    0.0432658
stardiff contour -excluded 0.005   -0.0343038    0.0432658