subtract 10%iles  -0.00155878    0.0100205    0.0211782    0.0337925
    0.0490649    0.0692415    0.0991840     0.152339     0.286826
diff 10%iles    -0.132730   -0.0603545   -0.0315232   -0.0134792   0.00113964
    0.0158372    0.0341129    0.0633650     0.136176
stardiff 10%iles   -0.0329537   -0.0162445  -0.00792613  -0.00185166
   0.00349285   0.00884511    0.0149735    0.0234550    0.0407302
stardiff contour -excluded 0.005   -0.0329537    0.0407302