subtract 10%iles      0.00000    0.0134921    0.0684333     0.128568
     0.203727     0.309780     0.484743     0.817502      1.62884
diff 10%iles    -0.372442    -0.149118   -0.0619106   -0.0139145      0.00000
    0.0130363    0.0618916     0.150996     0.377225
stardiff 10%iles   -0.0546248   -0.0186511  -0.00528759      0.00000
   0.00103733   0.00830683    0.0176160    0.0331213    0.0718828
stardiff contour -excluded 0.005   -0.0546248    0.0718827