subtract 10%iles  -0.00232172   0.00948334    0.0208673    0.0341797
    0.0510750    0.0739651     0.107485     0.162998     0.286697
diff 10%iles    -0.141725   -0.0667038   -0.0341821   -0.0145061  0.000625610
    0.0157471    0.0354385    0.0679922     0.142996
stardiff 10%iles   -0.0362239   -0.0175633  -0.00868533  -0.00237084
   0.00309748   0.00854998    0.0148150    0.0236095    0.0416003
stardiff contour -excluded 0.005   -0.0362239    0.0416003