subtract 10%iles   -0.0704556      0.00000      0.00000    0.0477514
     0.129252     0.250152     0.448750     0.840920      1.82025
diff 10%iles    -0.445819    -0.192278   -0.0839021   -0.0200729      0.00000
    0.0146580    0.0758839     0.180729     0.430501
stardiff 10%iles   -0.0712638   -0.0276215  -0.00998767 -5.00679e-05
      0.00000   0.00696073    0.0174236    0.0334067    0.0698891
stardiff contour -excluded 0.005   -0.0712638    0.0698890