subtract 10%iles      0.00000      0.00000    0.0226663    0.0545421
    0.0941200     0.149319     0.234867     0.381747     0.722736
diff 10%iles    -0.269368    -0.107416   -0.0444617  -0.00982928      0.00000
   0.00881720    0.0425602     0.104677     0.266178
stardiff 10%iles   -0.0365077   -0.0117926  -0.00280917      0.00000
   0.00136018   0.00642588    0.0128442    0.0232305    0.0475204
stardiff contour -excluded 0.005   -0.0365077    0.0475204