subtract 10%iles      0.00000   0.00294518    0.0492313     0.102760
     0.172812     0.274296     0.433670     0.721559      1.42554
diff 10%iles    -0.354739    -0.151734   -0.0650845   -0.0152118      0.00000
    0.0117173    0.0592780     0.142767     0.343828
stardiff 10%iles   -0.0510531   -0.0183067  -0.00524503      0.00000
  0.000732720   0.00735527    0.0156222    0.0285813    0.0578371
stardiff contour -excluded 0.005   -0.0510531    0.0578370