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 |
| --- | --- | --- | --- | --- |
| Nelson Piquet | Williams - Honda | 44.0 | 1:21:25.091 | 4.0 |
| Stefan Johansson | McLaren - TAG | 44.0 | + 1:39.591 | 8.0 |
| Ayrton Senna | Lotus - Honda | 43.0 | + 1 Lap | 2.0 |
| Philippe Streiff | Tyrrell - Ford | 43.0 | + 1 Lap | 22.0 |
| Jonathan Palmer | Tyrrell - Ford | 43.0 | + 1 Lap | 23.0 |
| Philippe Alliot | Lola - Ford | 42.0 | + 2 Laps | 21.0 |
| Alain Prost | McLaren - TAG | 39.0 | Electrical | 3.0 |
| Martin Brundle | Zakspeed | 34.0 | Not Classified | 19.0 |
| Piercarlo Ghinzani | Ligier - Megatron | 32.0 | Engine | 17.0 |
| Adrián Campos | Minardi - Motori Moderni | 28.0 | Engine | 18.0 |
| Thierry Boutsen | Benetton - Ford | 26.0 | Engine | 6.0 |
| Nigel Mansell | Williams - Honda | 25.0 | Engine | 1.0 |
| Alessandro Nannini | Minardi - Motori Moderni | 25.0 | Engine | 16.0 |
| Derek Warwick | Arrows - Megatron | 23.0 | Turbo | 13.0 |
| Christian Danner | Zakspeed | 21.0 | Halfshaft | 20.0 |
| Gerhard Berger | Ferrari | 19.0 | Turbo | 10.0 |
| Teo Fabi | Benetton - Ford | 18.0 | Engine | 9.0 |
| Alex Caffi | Osella - Alfa Romeo | 17.0 | Engine | 26.0 |
| Andrea de Cesaris | Brabham - BMW | 12.0 | Engine | 7.0 |
| Michele Alboreto | Ferrari | 10.0 | Turbo | 5.0 |
| Pascal Fabre | AGS - Ford | 10.0 | Engine | 25.0 |
| Eddie Cheever | Arrows - Megatron | 9.0 | Throttle | 15.0 |
| Satoru Nakajima | Lotus - Honda | 9.0 | Turbo | 14.0 |
| Ivan Capelli | March - Ford | 7.0 | Engine | 24.0 |
| René Arnoux | Ligier - Megatron | 6.0 | Ignition | 12.0 |
| Riccardo Patrese | Brabham - BMW | 5.0 | Ignition | 11.0 |
Question:
What is the average number of laps for a grid of 6?
Answer:
26.0