subtract 10%iles      0.00000    0.0187099     0.104401     0.197736
     0.313883     0.482140     0.747092      1.21473      2.25525
diff 10%iles    -0.462749    -0.194951   -0.0833306   -0.0196368      0.00000
    0.0162559    0.0807319     0.191817     0.457141
stardiff 10%iles   -0.0677433   -0.0256493  -0.00857496      0.00000
  0.000104675   0.00939735    0.0212335    0.0400007    0.0825669
stardiff contour -excluded 0.005   -0.0677433    0.0825665