subtract 10%iles  0.000203133   0.00658417    0.0120993    0.0179071
    0.0249538    0.0348692    0.0511169    0.0835457     0.175997
diff 10%iles   -0.0626144   -0.0278468   -0.0147724  -0.00641775  0.000576496
   0.00759840    0.0160522    0.0293212    0.0642302
stardiff 10%iles   -0.0249290   -0.0130676  -0.00695171  -0.00233731
   0.00178747   0.00594614    0.0106872    0.0171570    0.0301909
stardiff contour -excluded 0.005   -0.0249290    0.0301909