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

### Instruction:
When 4744 is the avg. trips per mile (x1000) what is the current stock?

### Inputs:
table_name: table, columns: ['Name', 'Map colour', 'First operated', 'Type', 'Length', 'No. Sta', 'Current Stock', 'Future Stock', 'Trips per annum (×1000)', 'Avg. trips per mile (×1000)']

### Response:
SELECT Current Stock FROM table WHERE Avg. trips per mile (×1000) = 4744