Among the statistics provided by our site is the number of items related to a tag.
As illustrated below, near the top of each overview page you can see the total of items tagged.
Even if the overview runs over several pages, this total accounts for all items in the overview.
Whenever you use 'Filter by ...' options in overview pages, totals of items change accordingly.
Each total number of tags displayed takes into account filters that have been applied to an overview.