subtract 10%iles  -0.00110912   0.00938320    0.0194016    0.0309119
    0.0453033    0.0647411    0.0937347     0.144998     0.274537
diff 10%iles    -0.129031   -0.0571442   -0.0290568   -0.0124102  0.000570297
    0.0135596    0.0302262    0.0583639     0.130508
stardiff 10%iles   -0.0348798   -0.0165967  -0.00824756  -0.00233392
   0.00280005   0.00795227    0.0139077    0.0223595    0.0406534
stardiff contour -excluded 0.005   -0.0348798    0.0406533