Template:Publications established in/doc

This template count the number of pages in. Using 1999 as an example, it counts

and sums them up, giving.
 * Category:Publications established in 1999
 * Category:Academic journals established in 1999
 * Category:Magazines established in 1999
 * Category:Newspapers established in 1999
 * Category:1999 comics debuts

Other subcategories are ignored.