subtract 10%iles -0.000303268    0.0120661    0.0230153    0.0344839
    0.0476799    0.0643997    0.0882580     0.129513     0.234154
diff 10%iles   -0.0817108   -0.0417061   -0.0233402   -0.0104914  0.000545502
    0.0115700    0.0243587    0.0426216    0.0823383
stardiff 10%iles   -0.0386218   -0.0206653   -0.0109839  -0.00371523
   0.00271541   0.00912010    0.0162683    0.0256277    0.0424717
stardiff contour -excluded 0.005   -0.0386218    0.0424717