subtract 10%iles      0.00000      0.00000    0.0215541    0.0497804
    0.0831752     0.125457     0.185247     0.285004     0.522286
stardiff 10%iles    -0.187964   -0.0819273   -0.0385350   -0.0117955
      0.00000   0.00437143    0.0302195    0.0739684     0.182029
stardiff contour -excluded 0.005    -0.187964     0.182029