subtract 10%iles      0.00000   0.00295428    0.0542192     0.113276
     0.190541     0.303468     0.481593     0.803369      1.59668
diff 10%iles    -0.374886    -0.160350   -0.0686135   -0.0157535      0.00000
    0.0126892    0.0628269     0.150927     0.363040
stardiff 10%iles   -0.0542610   -0.0194989  -0.00555754      0.00000
  0.000784874   0.00779834    0.0165418    0.0302131    0.0609977
stardiff contour -excluded 0.005   -0.0542610    0.0609977