subtract 10%iles      0.00000      0.00000    0.0220621    0.0484619
    0.0799766     0.121266     0.181310     0.285685     0.549449
diff 10%iles    -0.209959   -0.0816751   -0.0346353  -0.00821137      0.00000
   0.00697613    0.0333710    0.0810471     0.210947
stardiff 10%iles   -0.0312151   -0.0103921  -0.00284259      0.00000
  0.000911742   0.00539182    0.0109275    0.0196536    0.0410364
stardiff contour -excluded 0.005   -0.0312151    0.0410363