subtract 10%iles      0.00000    0.0111189    0.0592303     0.110542
     0.170862     0.254816     0.387312     0.636239      1.27062
diff 10%iles    -0.323693    -0.128714   -0.0537777   -0.0125427      0.00000
    0.0107756    0.0528526     0.130116     0.330148
stardiff 10%iles   -0.0533004   -0.0187645  -0.00592806      0.00000
  0.000333518   0.00726067    0.0160384    0.0302564    0.0655822
stardiff contour -excluded 0.005   -0.0533004    0.0655821