subtract 10%iles  -0.00241423   0.00945568    0.0206375    0.0335140
    0.0496120    0.0714111     0.104261     0.162758     0.308067
diff 10%iles    -0.140182   -0.0632424   -0.0326014   -0.0141330  0.000385284
    0.0148058    0.0329580    0.0628662     0.138179
stardiff 10%iles   -0.0395524   -0.0187490  -0.00941209  -0.00276642
   0.00300407   0.00871598    0.0152005    0.0241949    0.0432040
stardiff contour -excluded 0.005   -0.0395524    0.0432040