subtract 10%iles -0.000393867    0.0196543    0.0381308    0.0585327
    0.0827637     0.113351     0.155516     0.222531     0.364238
diff 10%iles    -0.140533   -0.0702839   -0.0382347   -0.0169039  0.000795364
    0.0185337    0.0399342    0.0719309     0.141730
stardiff 10%iles   -0.0367558   -0.0192603  -0.00999078  -0.00307746
   0.00301035   0.00905009    0.0157964    0.0246521    0.0407836
stardiff contour -excluded 0.005   -0.0367558    0.0407836