I'm not a copyright lawyer (yada, yada...), but I don't believe that tables of data are generally considered copyrightable. Because they gather together data that generally exists in other places, to be 'proprietary' they have to be arranged, edited or compiled is such a way that the table itself meets the criteria for "an original work of art."

This is from the 'Definitions' section of the Copyright law:

A “compilation” is a work formed by the collection and assembling of preexisting materials or of data that are selected, coordinated, or arranged in such a way that the resulting work as a whole constitutes an original work of authorship. The term “compilation” includes collective works.