subtract 10%iles      0.00000   0.00268698    0.0343423    0.0681024
     0.107796     0.161402     0.243001     0.386929     0.731715
diff 10%iles    -0.260179    -0.102595   -0.0435820   -0.0108442      0.00000
   0.00781870    0.0410476     0.101700     0.261364
stardiff 10%iles   -0.0373335   -0.0132393  -0.00397970      0.00000
  0.000577014   0.00570406    0.0120644    0.0222354    0.0479516
stardiff contour -excluded 0.005   -0.0373335    0.0479515