subtract 10%iles  -0.00303268   0.00532675    0.0126896    0.0208464
    0.0308328    0.0444317    0.0651035     0.102306     0.196571
diff 10%iles   -0.0991879   -0.0442533   -0.0227833  -0.00980043  0.000597477
    0.0109959    0.0239353    0.0453014    0.0999475
stardiff 10%iles   -0.0292475   -0.0148687  -0.00762642  -0.00227478
   0.00244038   0.00714485    0.0124633    0.0196774    0.0339696
stardiff contour -excluded 0.005   -0.0292475    0.0339696