subtract 10%iles      0.00000      0.00000    0.0216599    0.0478578
    0.0789726     0.119473     0.177754     0.276070     0.525044
diff 10%iles    -0.200899   -0.0778694   -0.0329282  -0.00750542      0.00000
   0.00713396    0.0325992    0.0776122     0.200865
stardiff 10%iles   -0.0311078   -0.0102751  -0.00267809      0.00000
   0.00106200   0.00550301    0.0109803    0.0196273    0.0404674
stardiff contour -excluded 0.005   -0.0311078    0.0404674