subtract 10%iles      0.00000   0.00820732    0.0511191    0.0958858
     0.147782     0.218427     0.330331     0.534945      1.04602
diff 10%iles    -0.295924    -0.116740   -0.0487869   -0.0112028      0.00000
    0.0102897    0.0486096     0.118531     0.301591
stardiff 10%iles   -0.0447357   -0.0148688  -0.00394619      0.00000
   0.00118381   0.00726126    0.0149673    0.0275704    0.0586355
stardiff contour -excluded 0.005   -0.0447357    0.0586355