subtract 10%iles      0.00000      0.00000    0.0171857    0.0390813
    0.0654755     0.100829     0.153909     0.248734     0.493002
diff 10%iles    -0.191209   -0.0739651   -0.0315372  -0.00760782      0.00000
   0.00611603    0.0300117    0.0723422     0.189160
stardiff 10%iles   -0.0279131  -0.00940081  -0.00258353      0.00000
  0.000865769   0.00493573   0.00994030    0.0177969    0.0370573
stardiff contour -excluded 0.005   -0.0279131    0.0370573