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 |
| --- | --- | --- | --- | --- |
| Mika Häkkinen | McLaren - Mercedes | 77.0 | 1:45:33.869 | 3.0 |
| Michael Schumacher | Ferrari | 77.0 | +7.917 | 1.0 |
| David Coulthard | McLaren - Mercedes | 77.0 | +8.455 | 2.0 |
| Rubens Barrichello | Ferrari | 77.0 | +44.157 | 5.0 |
| Ralf Schumacher | Williams - BMW | 77.0 | +50.437 | 4.0 |
| Heinz-Harald Frentzen | Jordan - Mugen-Honda | 77.0 | +1:08.099 | 6.0 |
| Jarno Trulli | Jordan - Mugen-Honda | 76.0 | +1 Lap | 12.0 |
| Eddie Irvine | Jaguar - Cosworth | 76.0 | +1 Lap | 10.0 |
| Jenson Button | Williams - BMW | 76.0 | +1 Lap | 8.0 |
| Mika Salo | Sauber - Petronas | 76.0 | +1 Lap | 9.0 |
| Alexander Wurz | Benetton - Playlife | 76.0 | +1 Lap | 11.0 |
| Jacques Villeneuve | BAR - Honda | 75.0 | +2 Laps | 16.0 |
| Jos Verstappen | Arrows - Supertec | 75.0 | +2 Laps | 20.0 |
| Ricardo Zonta | BAR - Honda | 75.0 | +2 Laps | 18.0 |
| Marc Gené | Minardi - Fondmetal | 74.0 | +3 Laps | 21.0 |
| Pedro de la Rosa | Arrows - Supertec | 73.0 | +4 Laps | 15.0 |
| Gastón Mazzacane | Minardi - Fondmetal | 68.0 | Engine | 22.0 |
| Johnny Herbert | Jaguar - Cosworth | 67.0 | Gearbox | 17.0 |
| Pedro Diniz | Sauber - Petronas | 62.0 | Transmission | 13.0 |
| Giancarlo Fisichella | Benetton - Playlife | 31.0 | Brakes | 7.0 |
| Nick Heidfeld | Prost - Peugeot | 22.0 | Electrical | 19.0 |
| Jean Alesi | Prost - Peugeot | 11.0 | Suspension | 14.0 |
Question:
How many laps did Nick Heidfeld drive on grids larger than 4?
Answer:
22.0