subtract 10%iles -0.000978470   0.00669265    0.0133612    0.0204058
    0.0287373    0.0399714    0.0577321    0.0928497     0.199005
diff 10%iles   -0.0682669   -0.0319605   -0.0174193  -0.00755930  0.000881195
   0.00934315    0.0193238    0.0343862    0.0727761
stardiff 10%iles   -0.0278103   -0.0150655  -0.00808276  -0.00267922
   0.00215209   0.00694500    0.0122629    0.0192938    0.0333783
stardiff contour -excluded 0.005   -0.0278103    0.0333783