MELBOURNE, AUSTRALIA - JULY 23: A woman uses a fuel dispenser to fill her car up with petrol at a petrol station on July 23, 2013 in Melbourne, Australia. According to CommSec, fuel prices are expected to rise further as global demand increases and as the weak Australian dollar raises the costs of fuel imports. The average fuel price nationally is at 153.5 cents per litre, which is reportedly the fastest price increase accross the nation in four years. (Photo by Scott Barbour/Getty Images)