CREATE TABLE table_35512 ("Manufacturer" TEXT, "Model" TEXT, "Quantity" FLOAT, "Introduced" FLOAT, "Retired" FLOAT)

How many in the introduced section had Fokker as a manufacturer, a quantity of 5, and retired later than 1999?
SELECT SUM("Introduced") FROM table_35512 WHERE "Manufacturer" = 'fokker' AND "Quantity" = '5' AND "Retired" > '1999'
SELECT SUM("Introduced") FROM "table_35512" WHERE "Manufacturer" = 'fokker' AND "Quantity" = '5' AND "Retired" > '1999'