user: Question: How many different drivers were there for the team when the manufacturer was Toyota?
Columns: ['Year', 'Date', 'Driver', 'Team', 'Manufacturer', 'Laps', 'Miles (km)', 'Race Time', 'Average Speed (mph)', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'April 23', 'Kurt Busch', 'Roush Racing', 'Ford', '312', '312 (502.115)', '3:02:16', '102.707', 'Report']
SQL:

assistant: SELECT COUNT("Driver") FROM "Table" WHERE "Manufacturer" = 'Toyota';