subtract 10%iles  -0.00139236    0.0108566    0.0217762    0.0337245
    0.0482795    0.0676141    0.0957556     0.142218     0.243164
diff 10%iles    -0.102562   -0.0496569   -0.0268059   -0.0117486  0.000843048
    0.0134506    0.0286207    0.0517242     0.105264
stardiff 10%iles   -0.0314400   -0.0170617  -0.00906950  -0.00294784
   0.00249363   0.00787763    0.0138270    0.0215376    0.0355318
stardiff contour -excluded 0.005   -0.0314400    0.0355318