subtract 10%iles      0.00000   0.00762648    0.0467376    0.0879717
     0.136288     0.201856     0.304254     0.489702     0.948730
diff 10%iles    -0.284893    -0.112971   -0.0474367   -0.0112958      0.00000
   0.00938225    0.0462856     0.113388     0.288950
stardiff 10%iles   -0.0408156   -0.0138181  -0.00399134      0.00000
  0.000845924   0.00645182    0.0135267    0.0250434    0.0537213
stardiff contour -excluded 0.005   -0.0408156    0.0537213