subtract 10%iles  0.000101089   0.00850344    0.0161574    0.0245667
    0.0349636    0.0492592    0.0714912     0.112867     0.221815
diff 10%iles   -0.0812573   -0.0372281   -0.0198865  -0.00892067  0.000103951
   0.00910378    0.0199761    0.0369627    0.0793610
stardiff 10%iles   -0.0303261   -0.0151815  -0.00807244  -0.00291756
   0.00159738   0.00610362    0.0112233    0.0182299    0.0328207
stardiff contour -excluded 0.005   -0.0303261    0.0328207