subtract 10%iles      0.00000    0.0235853     0.112617     0.205984
     0.327200     0.497270     0.758663      1.21139      2.22945
diff 10%iles    -0.472959    -0.200703   -0.0867398   -0.0194697      0.00000
    0.0179348    0.0842695     0.195993     0.464612
stardiff 10%iles   -0.0663372   -0.0241611  -0.00749725      0.00000
  0.000613207   0.00972140    0.0210421    0.0387987    0.0797765
stardiff contour -excluded 0.005   -0.0663372    0.0797765