subtract 10%iles      0.00000      0.00000    0.0193119    0.0423217
    0.0705166     0.108765     0.166092     0.267843     0.528184
diff 10%iles    -0.203558   -0.0793891   -0.0337343  -0.00819612      0.00000
   0.00616574    0.0313411    0.0763888     0.200181
stardiff 10%iles   -0.0291512   -0.0100455  -0.00296755      0.00000
  0.000585541   0.00467152   0.00973488    0.0177023    0.0373354
stardiff contour -excluded 0.005   -0.0291512    0.0373354