Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many in the introduced section had Fokker as a manufacturer, a quantity of 5, and retired later than 1999?

### Inputs:
table_name: table, columns: ['Manufacturer', 'Model', 'Quantity', 'Introduced', 'Retired']

### Response:
SELECT SUM Introduced FROM table WHERE Manufacturer = fokker AND Quantity = 5 AND Retired > 1999