user: Question: How many years was Pontiac the manufacturer for Joe Gibbs Racing? 
Columns: ['Year', 'Date', 'Driver', 'Team', 'Manufacturer', 'Laps', 'Miles (km)', 'Race Time', 'Average Speed (mph)', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['1958', 'September 14', 'Speedy Thompson', 'Speedy Thompson', 'Chevrolet', 200.0, '100 (160.934)', '1:43:40', '57.878', 'Report']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Team" = 'Joe Gibbs Racing' AND "Manufacturer" = 'Pontiac';