The ornamental design for a table top, as shown and described.
FIG. 1 is a top plan view of a table top showing my new design;
FIG. 2 is a side elevational view, the opposite side being a mirror image thereof;
FIG. 3 is a perspective view thereof; and,
FIG. 4 is a top plan view with a representation of a design shown in dashed lines thereof.
The bottom view is not shown and forms no part of the claimed design. The dashed lines represent environmental elements only and form no part of the claimed design.