Table:
text: Jaguar XJR-15
Racing history
Spa Francorchamps
Position_ Race_Number Driver Country Laps
1. 10 Armin Hahne D 11
2. 7 Cor Euser NL 11
3. 6 Win Percy GB 11
4. 2 Will Hoy GB 11
5. 4 Bob Wollek F 11
6. 9 David Brabham AUS 11
7. 12 David Leslie GB 11
8. 16 Ian Flux GB 11
9. 8 Pierre Dieudonné B 11
10. 6 Jim Richards NZ 11
11. 17 Jeff Allam GB 11
12. 3 Andy Evans USA 11
13. 5 Tiff Needell GB 11
14. 11 Derek Warwick GB 8
DNF 14 Thierry Tassin B 4
DNF 15 John Watson GB 3

Question: Spa Francorchamps, racing history, how many laps did the jaguar XJR-15 do on average when the country was NL and the car number was less than 8?