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

### Instruction:
In what year Year has a Co-Drivers of jérôme policand christopher campbell?

### Inputs:
table_name: table, columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']

### Response:
SELECT SUM Year FROM table WHERE Co-Drivers = jérôme policand christopher campbell