Test for the effect of binning of Lyα flux to correct incompleteness of the number of LAEs. The median values and error bars of X_LAE for the plot of the evolution of X_LAE (Fig. 7) are shown. The black, purple, violet, orange, and yellow hexagons indicate N_bin = 6, 5, 4, 3, and 2, respectively. For visualization purposes, we slightly shift the points along the x-axis and show the width of z only for N_bin = 6.