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

### Instruction:
What CCM Chart had 18 total weeks?

### Inputs:
table_name: table, columns: ['Single', 'CCM Chart', 'Debut', 'Peak Date', 'Peak Pos', 'Total Wks', 'Spins (since 1998) source: Mediabase']

### Response:
SELECT CCM Chart FROM table WHERE Total Wks = 18