It is not possible to determine precisely the proportion of the increase in the Department's expenditure on fuel1 costs attributable to either volume or price. Over the period 2005-06 to 2007-08, however, fuel volumes consumed in Defence are estimated to have risen by around 5 per cent. Over the same period, the Department's expenditure on fuel rose by around 25 per cent., suggesting that price was the overwhelming factor in the increase in costs.
1 Defined as petroleum-based liquid fuels meeting internationally recognised specifications that are used to power ships and vehicles.