subtract 10%iles      0.00000      0.00000    0.0278854    0.0677576
     0.117047     0.185291     0.290968     0.469092     0.864980
diff 10%iles    -0.320108    -0.130273   -0.0540216   -0.0123564      0.00000
   0.00950384    0.0498843     0.124615     0.314516
stardiff 10%iles   -0.0458381   -0.0155336  -0.00414981      0.00000
  0.000896208   0.00684064    0.0146054    0.0271036    0.0555044
stardiff contour -excluded 0.005   -0.0458381    0.0555044