What do mostly all of the industries listed in Table 1, page 582 of the textbook have in common? Base your exp?

What do mostly all of the industries listed in Table 1, page 582 of the textbook have in common? Base your explanation on their concentration ratios.What do mostly all of the industries listed in Table 1, page 582 of the textbook have in common? Base your exp?
um... what textbook?