In 2005, Italys nominal gross domestic product (GDP) was $1.7 trillion, the fourth-largest in Europe and the tenth-largest in the world. In recent years, however, the performance of Italys economy has lagged the rest of the Eurozone countries. In 2004 and 2005, Italy experienced real GDP growth of 1.0 and 0.1 percent, respectively, compared to 1.8 and 1.4 percent for the Eurozone as a whole. Analysts predict that the Italian economy will grow by 1.0 percent in 2006, still Well below the Eurozone average. The sluggish performance of the Italian economy has led to a deterioration of the countrys public finances, with Italys fiscal deficit again breeching the 3.0 percent cap imposed by the EU Growth and Stability Pact. With limited domestic energy sources, Italy is highly dependent on imports to meet its consumption needs. In absolute terms, Oil consumption has remained relatively static since 1970, but oils share of Italys primary energy mix has decreased significantly, steadily replaced by Natural Gas. A pressing issue affecting Italy has been the countrys electricity supply. In the summer of 2003, increased electricity demand during a heat wave overwhelmed Italys electricity generation facilities, resulting in rolling blackouts. In September 2003, Italy suffered a nationwide blackout after a storm damaged a transmission line in Switzerland carrying electricity from France. Over the past decade, Italys installed electricity generation has not been able to keep up with demand, resulting in an increased share of electricity imports as a percent of total consumption.