subtract 10%iles -8.75741e-05      0.00000    0.0169411    0.0417864
    0.0721951     0.114109     0.178104     0.291008     0.575272
diff 10%iles    -0.222195   -0.0873435   -0.0368929  -0.00885391      0.00000
   0.00658512    0.0340102    0.0837164     0.218506
stardiff 10%iles   -0.0317971   -0.0108058  -0.00304216      0.00000
  0.000720363   0.00509013    0.0105040    0.0190730    0.0400738
stardiff contour -excluded 0.005   -0.0317971    0.0400738