subtract 10%iles      0.00000   0.00374222    0.0104542    0.0174556
    0.0255241    0.0362720    0.0535698    0.0859013     0.155425
diff 10%iles   -0.0876188   -0.0365453   -0.0159683  -0.00479221   0.00354910
    0.0116167    0.0213041    0.0369110    0.0837421
stardiff 10%iles   -0.0506638   -0.0178822  -0.00656206  6.35348e-05
   0.00536697    0.0104900    0.0162909    0.0246908    0.0467222
stardiff contour -excluded 0.005   -0.0506638    0.0467222