Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Driver | Constructor | Laps | Time/Retired | Grid |
| --- | --- | --- | --- | --- |
| John Surtees | Cooper - Maserati | 65.0 | 2:06:35.34 | 1.0 |
| Jack Brabham | Brabham - Repco | 65.0 | + 7.88 | 4.0 |
| Denny Hulme | Brabham - Repco | 64.0 | + 1 lap | 6.0 |
| Richie Ginther | Honda | 64.0 | + 1 lap | 3.0 |
| Dan Gurney | Eagle - Climax | 64.0 | + 1 lap | 9.0 |
| Jo Bonnier | Cooper - Maserati | 63.0 | + 2 laps | 12.0 |
| Peter Arundell | Lotus - BRM | 61.0 | + 4 laps | 17.0 |
| Ronnie Bucknum | Honda | 60.0 | + 5 laps | 13.0 |
| Pedro Rodríguez | Lotus - BRM | 49.0 | Differential | 8.0 |
| Bruce McLaren | McLaren - Ford | 40.0 | Engine | 14.0 |
| Jo Siffert | Cooper - Maserati | 33.0 | Suspension | 11.0 |
| Jochen Rindt | Cooper - Maserati | 32.0 | Suspension | 5.0 |
| Innes Ireland | BRM | 28.0 | Transmission | 16.0 |
| Jackie Stewart | BRM | 26.0 | Oil Leak | 10.0 |
| Bob Bondurant | Eagle - Weslake | 24.0 | Fuel System | 18.0 |
| Graham Hill | BRM | 18.0 | Engine | 7.0 |
| Jim Clark | Lotus - BRM | 9.0 | Gearbox | 2.0 |
| Moisés Solana | Cooper - Maserati | 9.0 | Overheating | 15.0 |
Question:
How many laps did Innes Ireland make when he had a grid more than 15?
Answer:
28.0