subtract 10%iles -5.81741e-05   0.00618839    0.0115979    0.0173340
    0.0244675    0.0349426    0.0522213    0.0842981     0.166064
diff 10%iles   -0.0455303   -0.0227473   -0.0127378  -0.00564528  0.000508308
   0.00660539    0.0135431    0.0233421    0.0463390
stardiff 10%iles   -0.0276406   -0.0149747  -0.00827093  -0.00316161
   0.00135447   0.00579454    0.0106887    0.0171241    0.0300182
stardiff contour -excluded 0.005   -0.0276406    0.0300182