subtract 10%iles      0.00000      0.00000    0.0191078    0.0416578
    0.0684614     0.103924     0.156122     0.248842     0.488924
diff 10%iles    -0.189403   -0.0730171   -0.0314188  -0.00783706      0.00000
   0.00578403    0.0293853    0.0713038     0.186977
stardiff 10%iles   -0.0269255  -0.00950119  -0.00289807      0.00000
  0.000519767   0.00445391   0.00927204    0.0166934    0.0347593
stardiff contour -excluded 0.005   -0.0269255    0.0347593