subtract 10%iles      0.00000   0.00220335    0.0373220    0.0768652
     0.125158     0.190130     0.286542     0.446365     0.796461
diff 10%iles    -0.278588    -0.115603   -0.0497257   -0.0117726      0.00000
   0.00931978    0.0462618     0.110832     0.273805
stardiff 10%iles   -0.0412975   -0.0143857  -0.00402491      0.00000
  0.000791244   0.00627527    0.0131270    0.0239654    0.0491304
stardiff contour -excluded 0.005   -0.0412975    0.0491304