subtract 10%iles  0.000247002   0.00622559    0.0111508    0.0160766
    0.0216646    0.0288603    0.0396757    0.0600967     0.119308
diff 10%iles   -0.0418024   -0.0210133   -0.0119743  -0.00562572 -0.000106812
   0.00543213    0.0118685    0.0211620    0.0429611
stardiff 10%iles   -0.0239800   -0.0132545  -0.00755810  -0.00323176
  0.000640941   0.00452538   0.00891563    0.0148382    0.0266652
stardiff contour -excluded 0.005   -0.0239800    0.0266652