subtract 10%iles      0.00000   0.00714469    0.0622964     0.128519
     0.211896     0.323958     0.510462     0.863216      1.71415
diff 10%iles    -0.382770    -0.153406   -0.0635815   -0.0141172      0.00000
    0.0135028    0.0639429     0.156105     0.388143
stardiff 10%iles   -0.0589662   -0.0202003  -0.00607704      0.00000
  0.000759363   0.00850093    0.0187117    0.0359029    0.0786033
stardiff contour -excluded 0.005   -0.0589662    0.0786033