The ornamental design for a table top, as shown and described.
FIG. 1 is a perspective view of a table top showing my new design. The legs are shown in broken lines for illustrative purposes only and form no part of the claimed design.
FIG. 2 is a top view thereof.
FIG. 3 is a bottom perspective view; and,
FIG. 4 is a perspective view showing the table top in folded condition.