subtract 10%iles      0.00000    0.0102965    0.0605485     0.116663
     0.186348     0.285847     0.449071     0.759547      1.51861
diff 10%iles    -0.359982    -0.143748   -0.0594501   -0.0135045      0.00000
    0.0122161    0.0592165     0.145507     0.365108
stardiff 10%iles   -0.0619525   -0.0211127  -0.00654380      0.00000
  0.000338078   0.00782263    0.0176259    0.0342414    0.0764228
stardiff contour -excluded 0.005   -0.0619525    0.0764228