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

### Instruction:
how many vehicles where top 13 time is 1:18.72

### Inputs:
table_name: table, columns: ['Pos', 'Driver', 'Vehicle', 'Top 13 Time', 'Shoot-Out Time', 'Best Time of Day']

### Response:
SELECT COUNT Vehicle FROM table WHERE Top 13 Time = 1:18.72