subtract 10%iles  -0.00102234   0.00513697    0.0100408    0.0148125
    0.0200419    0.0266418    0.0365963    0.0552835     0.106200
diff 10%iles   -0.0450530   -0.0232792   -0.0132561  -0.00596404  0.000416040
   0.00672722    0.0138559    0.0237613    0.0463037
stardiff 10%iles   -0.0260096   -0.0150058  -0.00847003  -0.00328802
   0.00134133   0.00588404    0.0108092    0.0170392    0.0282511
stardiff contour -excluded 0.005   -0.0260096    0.0282511