subtract 10%iles  6.05583e-05   0.00613642    0.0112720    0.0164394
    0.0222950    0.0299525    0.0418997    0.0657768     0.137691
diff 10%iles   -0.0477333   -0.0237703   -0.0132332  -0.00569248  0.000880241
   0.00742245    0.0149031    0.0254831    0.0501246
stardiff 10%iles   -0.0250270   -0.0140226  -0.00765661  -0.00264436
   0.00184934   0.00627122    0.0111000    0.0172975    0.0288468
stardiff contour -excluded 0.005   -0.0250270    0.0288468