subtract 10%iles  -0.00172806   0.00725341    0.0152969    0.0242674
    0.0354409    0.0508060    0.0742645     0.116150     0.220573
diff 10%iles    -0.110831   -0.0484540   -0.0246811   -0.0106907  0.000347137
    0.0113664    0.0253363    0.0490365     0.110990
stardiff 10%iles   -0.0307727   -0.0154716  -0.00795147  -0.00241689
   0.00246097   0.00733193    0.0128718    0.0204646    0.0358324
stardiff contour -excluded 0.005   -0.0307727    0.0358323