When lap 53, what's the average grid one?
Driver Constructor Laps Time/Retired Grid
1999 Italian Grand Prix
1123364
text text real text real
2-1123364-1
Classification
Classification
Heinz-Harald Frentzen Jordan - Mugen-Honda 53 1:17:02.923 2
Ralf Schumacher Williams - Supertec 53 +3.272 5
Mika Salo Ferrari 53 +11.932 6
Rubens Barrichello Stewart - Ford 53 +17.630 7
David Coulthard McLaren - Mercedes 53 +18.142 3
Eddie Irvine Ferrari 53 +27.402 8
Alessandro Zanardi Williams - Supertec 53 +28.047 4
Jacques Villeneuve BAR - Supertec 53 +41.797 11
Jean Alesi Sauber - Petronas 53 +42.198 13
Damon Hill Jordan - Mugen-Honda 53 +56.259 9
Olivier Panis Prost - Peugeot 52 Engine 10
Johnny Herbert Stewart - Ford 40 Clutch 15
Toranosuke Takagi Arrows 35 Spun off 22
Pedro de la Rosa Arrows 35 Withdrew 21
Mika Häkkinen McLaren - Mercedes 30 Spun off 1
Jarno Trulli Prost - Peugeot 29 Overheating 12
Ricardo Zonta BAR - Supertec 25 Wheel bearing 18
Luca Badoer Minardi - Ford 23 Collision 19
Alexander Wurz Benetton - Playlife 11 Electrical 14
Pedro Diniz Sauber - Petronas 1 Spun off 16
Giancarlo Fisichella Benetton - Playlife 1 Spun off 17
Marc Gené Minardi - Ford 0 Collision 20
SELECT AVG Grid FROM table WHERE Laps > 53
53