subtract 10%iles  -0.00140953   0.00893378    0.0185318    0.0294631
    0.0432777    0.0620975    0.0898733     0.136673     0.244781
diff 10%iles    -0.124159   -0.0571327   -0.0292397   -0.0124984  0.000648499
    0.0137334    0.0303845    0.0582309     0.124873
stardiff 10%iles   -0.0331578   -0.0168838  -0.00863361  -0.00246331
   0.00295543   0.00827406    0.0141970    0.0221643    0.0378975
stardiff contour -excluded 0.005   -0.0331578    0.0378975