subtract 10%iles  -0.00356293      0.00000    0.0216670    0.0607970
     0.109671     0.176710     0.277328     0.449912     0.846635
diff 10%iles    -0.300716    -0.127366   -0.0552902   -0.0136580      0.00000
   0.00898981    0.0484709     0.117195     0.288250
stardiff 10%iles   -0.0469928   -0.0173964  -0.00552043      0.00000
      0.00000   0.00568892    0.0127902    0.0238102    0.0491605
stardiff contour -excluded 0.005   -0.0469928    0.0491605