subtract 10%iles  -0.00178766    0.0102549    0.0216198    0.0342751
    0.0493202    0.0686982    0.0964642     0.143672     0.257425
diff 10%iles    -0.131851   -0.0608025   -0.0321722   -0.0141029  0.000598907
    0.0152435    0.0332415    0.0617199     0.132353
stardiff 10%iles   -0.0343350   -0.0171597  -0.00855540  -0.00226071
   0.00325764   0.00873582    0.0149057    0.0231790    0.0391659
stardiff contour -excluded 0.005   -0.0343350    0.0391659