subtract 10%iles      0.00000   0.00333095    0.0581096     0.120101
     0.201457     0.321474     0.513387     0.861359      1.71874
diff 10%iles    -0.386385    -0.165375   -0.0710092   -0.0167106      0.00000
    0.0130029    0.0650964     0.156362     0.375457
stardiff 10%iles   -0.0585669   -0.0215209  -0.00654808      0.00000
  0.000375792   0.00771143    0.0170400    0.0316856    0.0646499
stardiff contour -excluded 0.005   -0.0585669    0.0646498