subtract 10%iles  -0.00488138      0.00000    0.0106897    0.0339808
    0.0632334     0.103343     0.164223     0.272513     0.548363
stardiff 10%iles    -0.338294    -0.131955   -0.0546298   -0.0114557
      0.00000    0.0133238    0.0568493     0.134904     0.344017
stardiff contour -excluded 0.005    -0.338294     0.344017