subtract 10%iles      0.00000   0.00670195    0.0526657     0.103138
     0.163207     0.248079     0.385582     0.650552      1.31184
diff 10%iles    -0.334028    -0.133263   -0.0553856   -0.0126407      0.00000
    0.0113852    0.0547307     0.134374     0.339147
stardiff 10%iles   -0.0501131   -0.0170506  -0.00497925      0.00000
  0.000779353   0.00737090    0.0157019    0.0294134    0.0636097
stardiff contour -excluded 0.005   -0.0501131    0.0636096