subtract 10%iles   0.00172377    0.0308132    0.0578232    0.0867748
     0.119848     0.159885     0.212769     0.292421     0.455906
diff 10%iles    -0.183160   -0.0922222   -0.0504425   -0.0224743  0.000745773
    0.0239444    0.0517988    0.0931320     0.182665
stardiff 10%iles   -0.0437241   -0.0223074   -0.0112514  -0.00318758
   0.00380019    0.0107030    0.0184340    0.0286614    0.0473771
stardiff contour -excluded 0.005   -0.0437241    0.0473771