subtract 10%iles  -0.00277853   0.00914192    0.0200558    0.0321207
    0.0463829    0.0647736    0.0912838     0.136622     0.247519
diff 10%iles    -0.129616   -0.0600224   -0.0318952   -0.0140285  0.000549316
    0.0151281    0.0329819    0.0611649     0.130665
stardiff 10%iles   -0.0343137   -0.0173064  -0.00869722  -0.00237350
   0.00316807   0.00866980    0.0148465    0.0231434    0.0392734
stardiff contour -excluded 0.005   -0.0343137    0.0392734