subtract 10%iles  0.000597477   0.00649071    0.0115800    0.0169172
    0.0233612    0.0322504    0.0462456    0.0726795     0.148720
diff 10%iles   -0.0463638   -0.0222161   -0.0124121  -0.00577807 -0.000115395
   0.00553322    0.0120926    0.0216498    0.0447197
stardiff 10%iles   -0.0270338   -0.0140641  -0.00782673  -0.00328009
  0.000716018   0.00469718   0.00920791    0.0153979    0.0283550
stardiff contour -excluded 0.005   -0.0270338    0.0283550