subtract 10%iles      0.00000      0.00000    0.0240917    0.0554304
    0.0923767     0.139830     0.203720     0.313929     0.591877
diff 10%iles    -0.216658   -0.0838460   -0.0353203  -0.00844193      0.00000
   0.00706005    0.0343566    0.0840619     0.219594
stardiff 10%iles   -0.0308826   -0.0104988  -0.00297626      0.00000
  0.000830352   0.00530520    0.0109006    0.0197347    0.0416858
stardiff contour -excluded 0.005   -0.0308826    0.0416857