subtract 10%iles -0.000485420    0.0113029    0.0223334    0.0344124
    0.0487661    0.0673771    0.0942287     0.140411     0.255794
diff 10%iles    -0.118713   -0.0546074   -0.0290451   -0.0126896  0.000766277
    0.0142612    0.0307570    0.0568657     0.123507
stardiff 10%iles   -0.0323415   -0.0163033  -0.00816793  -0.00220124
   0.00304306   0.00826309    0.0141743    0.0221767    0.0380015
stardiff contour -excluded 0.005   -0.0323415    0.0380015