subtract 10%iles      0.00000   0.00192790    0.0405960    0.0867977
     0.145957     0.229583     0.357046     0.578261      1.08885
diff 10%iles    -0.314975    -0.134073   -0.0575910   -0.0134001      0.00000
    0.0104263    0.0522093     0.125674     0.304821
stardiff 10%iles   -0.0466824   -0.0166184  -0.00480068      0.00000
  0.000644960   0.00670956    0.0142908    0.0261938    0.0531765
stardiff contour -excluded 0.005   -0.0466824    0.0531764