subtract 10%iles      0.00000      0.00000    0.0212488    0.0465871
    0.0766287     0.116260     0.174038     0.274397     0.529069
stardiff 10%iles    -0.318271    -0.123763   -0.0515485   -0.0108730
      0.00000    0.0134049    0.0550750     0.128610     0.325364
stardiff contour -excluded 0.005    -0.318271     0.325364