subtract 10%iles -0.000300884    0.0123205    0.0236130    0.0355320
    0.0493560    0.0670700    0.0927758     0.137668     0.247712
diff 10%iles   -0.0833931   -0.0424423   -0.0236616   -0.0105572  0.000696421
    0.0119538    0.0250473    0.0437927    0.0846577
stardiff 10%iles   -0.0387655   -0.0205370   -0.0107326  -0.00336866
   0.00314964   0.00964158    0.0168967    0.0264215    0.0436523
stardiff contour -excluded 0.005   -0.0387655    0.0436523