Table:
text: 2008 Chinese motorcycle Grand Prix
MotoGP classification
MotoGP classification
Rider Manufacturer Laps Time_ Grid
Valentino Rossi Yamaha 22 44:08.061 2
Dani Pedrosa Honda 22 +3.890 5
Casey Stoner Ducati 22 +15.928 3
Jorge Lorenzo Yamaha 22 +22.494 4
Marco Melandri Ducati 22 +26.957 12
Nicky Hayden Honda 22 +28.369 10
Colin Edwards Yamaha 22 +29.780 1
Toni Elias Ducati 22 +30.225 15
Loris Capirossi Suzuki 22 +31.440 6
Shinya Nakano Honda 22 +35.969 13
Andrea Dovizioso Honda 22 +36.246 11
James Toseland Yamaha 22 +43.191 7
Randy de Puniet Honda 22 +43.442 9
John Hopkins Kawasaki 22 +45.855 14
Sylvain Guintoli Ducati 22 +46.330 17
Alex de Angelis Honda 22 +50.593 16

Question: What is the average grid when the time is +45.855 in the MotoGP classification of the 2008 Chinese motorcycle Grand Prix?