subtract 10%iles      0.00000      0.00000    0.0187392    0.0416236
    0.0686893     0.104524     0.157543     0.251644     0.495475
diff 10%iles    -0.189915   -0.0734506   -0.0318317  -0.00806117      0.00000
   0.00563610    0.0293974    0.0715127     0.187962
stardiff 10%iles   -0.0299919   -0.0106177  -0.00337500      0.00000
  0.000302926   0.00443365   0.00952165    0.0175105    0.0374307
stardiff contour -excluded 0.005   -0.0299919    0.0374307