subtract 10%iles -4.72069e-05   0.00594234    0.0109251    0.0159097
    0.0214739    0.0285530    0.0391903    0.0593686     0.115644
diff 10%iles   -0.0448380   -0.0230956   -0.0131493  -0.00596333  0.000337601
   0.00662231    0.0137835    0.0237455    0.0456781
stardiff 10%iles   -0.0241373   -0.0138708  -0.00783676  -0.00305928
   0.00125748   0.00554316    0.0102396    0.0161964    0.0267246
stardiff contour -excluded 0.005   -0.0241373    0.0267246