user: Question: How many years have a Make/ Model of new flyer c40lfr?
Columns: ['Make/ Model', 'length', 'Year', 'Numbers (Quantity Ordered)', 'Fuel Propulsion']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['NABI 40-LFW', "40'", 1998.0, '6001-6156 (156 buses)', 'LNG']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Make/ Model" = 'new flyer c40lfr';