subtract 10%iles      0.00000   0.00108051    0.0315795    0.0671414
     0.108848     0.165833     0.252766     0.405056     0.764961
diff 10%iles    -0.266441    -0.105279   -0.0443161  -0.00994873      0.00000
   0.00968361    0.0444355     0.106502     0.268859
stardiff 10%iles   -0.0405262   -0.0136465  -0.00365233      0.00000
   0.00109942   0.00670408    0.0138098    0.0252739    0.0531753
stardiff contour -excluded 0.005   -0.0405262    0.0531753