The bar chart compares the share of renewable energy of the total supply in four different countries in 2000, 2004, and 2007. Overall, more than half of all power in Norway and Iceland came from renewable sources, while in Australia and Germany these figures were much lower. It is also clear that the proportion of renewable energy noticeably rose in all given countries, except for Australia where it remained more or less unchanged.
In 2000, renewable energy made up over 60% of the total supply in Norway, a figure which saw a modest rise in 2004, prior to surging to a chart high of nearly 80% in 2007. The figure for Iceland started lower at just above 50% and, after dramatically increasing to 60% in 2004, fell back to around 55% by the end of the study period.
The other two countries – Germany and Australia – utilized much less renewable energy. The former began the period with slightly more than 10% of the total supply and witnessed a steady growth, closing at around 18% in 2007. The proportion of renewable power in Australia, on the other hand, hovered at close to 10% in all given years, which was the smallest percentage visable on the chart.