subtract 10%iles      0.00000   0.00360382    0.0310977    0.0597901
    0.0931425     0.137824     0.205058     0.322957     0.612546
diff 10%iles    -0.228865   -0.0897069   -0.0377908  -0.00904703      0.00000
   0.00740767    0.0364399    0.0895593     0.231915
stardiff 10%iles   -0.0318829   -0.0109243  -0.00317572      0.00000
  0.000744928   0.00528716    0.0109215    0.0199329    0.0426907
stardiff contour -excluded 0.005   -0.0318829    0.0426907