subtract 10%iles      0.00000      0.00000    0.0176606    0.0403074
    0.0677421     0.103796     0.156838     0.249516     0.487401
stardiff 10%iles    -0.295503    -0.113370   -0.0463190  -0.00853360
      0.00000    0.0127689    0.0524338     0.122714     0.309239
stardiff contour -excluded 0.005    -0.295503     0.309238