subtract 10%iles  0.000639915    0.0130773    0.0241075    0.0357251
    0.0492859    0.0667658    0.0918698     0.133395     0.224525
diff 10%iles   -0.0983438   -0.0476236   -0.0258484   -0.0114851  0.000533104
    0.0125198    0.0268364    0.0486002    0.0990834
stardiff 10%iles   -0.0321970   -0.0176493  -0.00943013  -0.00310560
   0.00250804   0.00803259    0.0140798    0.0218010    0.0354267
stardiff contour -excluded 0.005   -0.0321970    0.0354267