subtract 10%iles  -0.00145698   0.00604534    0.0124707    0.0192094
    0.0270071    0.0371265    0.0521913    0.0796013     0.153168
diff 10%iles   -0.0733163   -0.0344307   -0.0192356  -0.00917435 -0.000703096
   0.00766754    0.0173209    0.0313883    0.0653348
stardiff 10%iles   -0.0325816   -0.0173681  -0.00976261  -0.00406929
  0.000952005   0.00589660    0.0113262    0.0183528    0.0315889
stardiff contour -excluded 0.005   -0.0325816    0.0315889