subtract 10%iles -0.000139236   0.00610542    0.0113716    0.0166845
    0.0226622    0.0303135    0.0418735    0.0638618     0.126701
diff 10%iles   -0.0481367   -0.0244522   -0.0138905  -0.00633621  0.000260830
   0.00684357    0.0143776    0.0250406    0.0496063
stardiff 10%iles   -0.0249579   -0.0142238  -0.00800583  -0.00311800
   0.00127085   0.00560580    0.0103560    0.0164533    0.0276038
stardiff contour -excluded 0.005   -0.0249579    0.0276038