subtract 10%iles      0.00000   0.00633698    0.0465412    0.0897057
     0.139938     0.208059     0.315286     0.510520     0.994410
diff 10%iles    -0.289643    -0.114874   -0.0479767   -0.0112996      0.00000
   0.00967145    0.0472244     0.115803     0.294817
stardiff 10%iles   -0.0419646   -0.0141548  -0.00407386      0.00000
  0.000860383   0.00663257    0.0140129    0.0260796    0.0560885
stardiff contour -excluded 0.005   -0.0419646    0.0560885