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 |
| --- | --- | --- | --- | --- |
| Jim Clark | Lotus - Ford | 90.0 | 2:14:45.1 | 8.0 |
| Jack Brabham | Brabham - Repco | 90.0 | + 23.6 | 3.0 |
| Denny Hulme | Brabham - Repco | 90.0 | + 25.7 | 7.0 |
| Chris Amon | Ferrari | 90.0 | + 27.3 | 9.0 |
| Mike Parkes | Ferrari | 89.0 | + 1 Lap | 10.0 |
| Ludovico Scarfiotti | Ferrari | 89.0 | + 1 Lap | 15.0 |
| Chris Irwin | Lotus - BRM | 88.0 | + 2 Laps | 13.0 |
| Mike Spence | BRM | 87.0 | + 3 Laps | 12.0 |
| Bob Anderson | Brabham - Climax | 86.0 | + 4 Laps | 17.0 |
| Jo Siffert | Cooper - Maserati | 83.0 | + 7 Laps | 16.0 |
| John Surtees | Honda | 73.0 | Throttle | 6.0 |
| Jackie Stewart | BRM | 51.0 | Brakes | 11.0 |
| Jochen Rindt | Cooper - Maserati | 41.0 | Suspension | 4.0 |
| Pedro Rodríguez | Cooper - Maserati | 39.0 | Gearbox | 5.0 |
| Graham Hill | Lotus - Ford | 11.0 | Engine | 1.0 |
| Dan Gurney | Eagle - Weslake | 8.0 | Injection | 2.0 |
| Bruce McLaren | McLaren - BRM | 1.0 | Accident | 14.0 |
Question:
How many laps did mike spence complete grids above 12?
Answer:
0.0