subtract 10%iles -0.000198841   0.00653076    0.0124292    0.0187902
    0.0266666    0.0377271    0.0553422    0.0889387     0.177597
diff 10%iles   -0.0709686   -0.0312681   -0.0165496  -0.00753236 -0.000184059
   0.00711989    0.0159824    0.0302618    0.0686429
stardiff 10%iles   -0.0287413   -0.0145070  -0.00784177  -0.00303343
   0.00117137   0.00536616    0.0101550    0.0167899    0.0307504
stardiff contour -excluded 0.005   -0.0287413    0.0307504