subtract 10%iles  0.000314474    0.0248184    0.0478525    0.0732155
     0.103096     0.140662     0.192163     0.272227     0.437401
diff 10%iles    -0.165923   -0.0823236   -0.0444641   -0.0194855   0.00110817
    0.0217381    0.0467615    0.0844650     0.167196
stardiff 10%iles   -0.0411668   -0.0210221   -0.0106952  -0.00310553
   0.00354609    0.0101674    0.0176476    0.0276569    0.0465314
stardiff contour -excluded 0.005   -0.0411668    0.0465314