subtract 10%iles -0.000778198   0.00507736   0.00975084    0.0143051
    0.0192986    0.0255179    0.0345840    0.0508709    0.0943985
diff 10%iles   -0.0423007   -0.0217686   -0.0123999  -0.00566578  0.000202179
   0.00603867    0.0126791    0.0219646    0.0426636
stardiff 10%iles   -0.0246749   -0.0140110  -0.00795092  -0.00323663
  0.000978736   0.00515205   0.00973676    0.0156329    0.0264583
stardiff contour -excluded 0.005   -0.0246749    0.0264583