subtract 10%iles   -0.0254982      0.00000    0.0191710    0.0850396
     0.173403     0.301106     0.506247     0.892776      1.83401
diff 10%iles    -0.451296    -0.194917   -0.0856242   -0.0208344      0.00000
    0.0140896    0.0755811     0.181043     0.432904
stardiff 10%iles   -0.0716000   -0.0282646   -0.0104855 -0.000321788
      0.00000   0.00661681    0.0169988    0.0328495    0.0690028
stardiff contour -excluded 0.005   -0.0716000    0.0690026