subtract 10%iles      0.00000      0.00000    0.0162754    0.0391250
    0.0670757     0.105013     0.161434     0.260571     0.512965
diff 10%iles    -0.198327   -0.0772629   -0.0329626  -0.00805426      0.00000
   0.00599289    0.0306854    0.0744175     0.194955
stardiff 10%iles   -0.0296868   -0.0102251  -0.00302313      0.00000
  0.000582112   0.00472458   0.00984564    0.0178247    0.0374300
stardiff contour -excluded 0.005   -0.0296868    0.0374300