subtract 10%iles  -0.00314140   0.00875473    0.0197906    0.0323257
    0.0476751    0.0680833    0.0983725     0.152182     0.292534
diff 10%iles    -0.139133   -0.0627229   -0.0323977   -0.0138712  0.000821590
    0.0155060    0.0341210    0.0647888     0.141829
stardiff 10%iles   -0.0372447   -0.0177599  -0.00866549  -0.00218690
   0.00344619   0.00903987    0.0154478    0.0244734    0.0439161
stardiff contour -excluded 0.005   -0.0372447    0.0439161