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 |
| --- | --- | --- | --- | --- |
| Denny Hulme | McLaren - Ford | 65.0 | 1:54:08.80 | 4.0 |
| Jacky Ickx | Brabham - Ford | 65.0 | + 2.56 | 2.0 |
| Jack Brabham | Brabham - Ford | 65.0 | + 38.48 | 1.0 |
| Jackie Stewart | Matra - Ford | 65.0 | + 47.04 | 3.0 |
| Jean-Pierre Beltoise | Matra - Ford | 65.0 | + 1:38.52 | 8.0 |
| Jackie Oliver | BRM | 63.0 | + 2 Laps | 12.0 |
| Pedro Rodríguez | Ferrari | 63.0 | + 2 Laps | 15.0 |
| Johnny Servoz-Gavin | Matra - Ford | 63.0 | + 2 Laps | 14.0 |
| Pete Lovely | Lotus - Ford | 62.0 | + 3 Laps | 16.0 |
| Piers Courage | Brabham - Ford | 61.0 | + 4 Laps | 9.0 |
| Silvio Moser | Brabham - Ford | 60.0 | Fuel Leak | 13.0 |
| John Surtees | BRM | 53.0 | Gearbox | 10.0 |
| Jochen Rindt | Lotus - Ford | 21.0 | Suspension | 6.0 |
| George Eaton | BRM | 6.0 | Gearbox | 17.0 |
| Jo Siffert | Lotus - Ford | 4.0 | Accident | 5.0 |
| John Miles | Lotus - Ford | 3.0 | Fuel Pump | 11.0 |
| Bruce McLaren | McLaren - Ford | 0.0 | Non Starter | 7.0 |
Question:
What is the average grid for piers courage?
Answer:
9.0