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

### Instruction:
How many years was the chassis a lotus-ford 38/7?

### Inputs:
table_name: table, columns: ['Year', 'Car number', 'Start', 'Qual. speed', 'Speed rank', 'Finish', 'Laps completed', 'Laps led', 'Race status', 'Chassis']

### Response:
SELECT COUNT Year FROM table WHERE Chassis = Lotus-Ford 38/7