subtract 10%iles      0.00000   0.00171673    0.0282731    0.0577235
    0.0928104     0.140052     0.210418     0.333447     0.633489
diff 10%iles    -0.234990   -0.0921741   -0.0387349  -0.00919557      0.00000
   0.00761223    0.0375206    0.0922520     0.238540
stardiff 10%iles   -0.0354417   -0.0120018  -0.00357568      0.00000
  0.000600643   0.00543611    0.0115460    0.0214277    0.0463401
stardiff contour -excluded 0.005   -0.0354417    0.0463401