In May 2006, fuel in Netherlands averaged €1.465 for petrol

Petrol, monthly average€1.465/L
Diesel, monthly average€1.099/L
LPG, monthly average€0.542/L
Weekly bulletins held for May 20065

Monthly averages for Netherlands across May 2006, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).