subtract 10%iles      0.00000      0.00000    0.0224372    0.0526209
    0.0889113     0.136307     0.204587     0.323118     0.616582
diff 10%iles    -0.235281   -0.0947647   -0.0407419  -0.00942397      0.00000
   0.00817645    0.0387373    0.0920870     0.232651
stardiff 10%iles   -0.0349022   -0.0118456  -0.00321454      0.00000
  0.000881272   0.00563116    0.0114477    0.0206632    0.0429907
stardiff contour -excluded 0.005   -0.0349022    0.0429907