subtract 10%iles  0.000755310    0.0270896    0.0524867    0.0803652
     0.113139     0.154356     0.210652     0.297595     0.477037
diff 10%iles    -0.200806    -0.102016   -0.0557895   -0.0248311  0.000650406
    0.0261054    0.0570374     0.103127     0.201282
stardiff 10%iles   -0.0475998   -0.0230077   -0.0109132  -0.00247135
   0.00471662    0.0118289    0.0199730    0.0312038    0.0527421
stardiff contour -excluded 0.005   -0.0475998    0.0527421