subtract 10%iles      0.00000  0.000997003    0.0397336    0.0877986
     0.150125     0.238866     0.374848     0.610326      1.15542
diff 10%iles    -0.321423    -0.137062   -0.0589619   -0.0139309      0.00000
    0.0105325    0.0532743     0.128163     0.310457
stardiff 10%iles   -0.0496207   -0.0180415  -0.00528115      0.00000
  0.000577837   0.00696276    0.0149530    0.0274070    0.0552854
stardiff contour -excluded 0.005   -0.0496207    0.0552854