subtract 10%iles      0.00000      0.00000    0.0187926    0.0436405
    0.0735984     0.113210     0.170977     0.269514     0.517946
diff 10%iles    -0.199099   -0.0769672   -0.0326736  -0.00770581      0.00000
   0.00661993    0.0317392    0.0764667     0.199327
stardiff 10%iles   -0.0284407  -0.00949732  -0.00264692      0.00000
  0.000842810   0.00503390    0.0102347    0.0183922    0.0382455
stardiff contour -excluded 0.005   -0.0284407    0.0382455