This is the passive form of the verb "to issue." (= to distribute, to assign)
(active voice)
The government issues a tax identification number (TIN) to each person.
Last year, the government issued 123,456 TINs.
This month, the government has issued 11,222 TINs.
(passive voice)
Each person is issued a tax identification number (TIN).
Last year, 123,456 TINs were issued.
This month, 11,222 TINs have been issued.