subtract 10%iles -0.000649929   0.00976324    0.0196810    0.0311127
    0.0456424    0.0654716    0.0949469     0.145565     0.267172
diff 10%iles    -0.124870   -0.0563440   -0.0288949   -0.0125618  0.000124931
    0.0127583    0.0288706    0.0557847     0.123615
stardiff 10%iles   -0.0359886   -0.0172436  -0.00869144  -0.00269594
   0.00248525   0.00766999    0.0136642    0.0221442    0.0397924
stardiff contour -excluded 0.005   -0.0359886    0.0397924