subtract 10%iles  0.000612259   0.00723553    0.0126734    0.0181341
    0.0244288    0.0327435    0.0455647    0.0693674     0.130793
diff 10%iles   -0.0459976   -0.0230179   -0.0130329  -0.00610685 -0.000149250
   0.00575352    0.0125284    0.0221796    0.0445404
stardiff 10%iles   -0.0270165   -0.0148039  -0.00840391  -0.00359136
  0.000662613   0.00488063   0.00957774    0.0157538    0.0276628
stardiff contour -excluded 0.005   -0.0270165    0.0276627