Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_94 (introduced INTEGER, retired VARCHAR, manufacturer VARCHAR, quantity VARCHAR)
### Question:
How many in the introduced section had Fokker as a manufacturer, a quantity of 5, and retired later than 1999?
### Answer:
SELECT SUM(introduced) FROM table_name_94 WHERE manufacturer = "fokker" AND quantity = 5 AND retired > 1999