subtract 10%iles -0.000837803   0.00841141    0.0168943    0.0263529
    0.0382123    0.0545797    0.0796871     0.124550     0.236565
diff 10%iles    -0.108356   -0.0482302   -0.0247231   -0.0106678  0.000554085
    0.0117533    0.0257926    0.0493326     0.109605
stardiff 10%iles   -0.0314958   -0.0160458  -0.00832024  -0.00257565
   0.00249270   0.00752335    0.0131751    0.0208458    0.0364419
stardiff contour -excluded 0.005   -0.0314958    0.0364419