subtract 10%iles  0.000511169   0.00655794    0.0114393    0.0161719
    0.0213585    0.0278230    0.0371799    0.0537109    0.0960906
diff 10%iles   -0.0412350   -0.0215778   -0.0123320  -0.00559902  0.000299931
   0.00615788    0.0127668    0.0218010    0.0412445
stardiff 10%iles   -0.0253114   -0.0144408  -0.00820490  -0.00331582
   0.00106858   0.00539914    0.0101258    0.0161343    0.0269453
stardiff contour -excluded 0.005   -0.0253114    0.0269453