subtract 10%iles      0.00000   0.00928426    0.0833073     0.163704
     0.266131     0.415630     0.651578      1.06868      2.02349
diff 10%iles    -0.430768    -0.185323   -0.0800183   -0.0179216      0.00000
    0.0158889    0.0759659     0.179565     0.424479
stardiff 10%iles   -0.0609027   -0.0222895  -0.00644681      0.00000
  0.000908464   0.00903646    0.0190250    0.0345773    0.0697541
stardiff contour -excluded 0.005   -0.0609027    0.0697541