The bar chart illustrates the proportion of sustanable energy of the total supply in 2000, 2004 and 2007.
In general, the percentage of green energy in Germany, Norway and iceand witnessed several changes while the opposite was true for Australia. Another striking feature is that Australia consistenly had the lowest chart.
In 2000, around 62% of renweable energy produced in Norway, making them highest among all other cities. This followed by 52% in Iceland, while around 9% to 10% of sustanable energy produced in Australia and Germany.
The percentage of green energy manufactured in Australia minimally increased to 10% in the next four years before plumping back to the starting level in 2007. The figure for Germany experienced a slight rise to 15% in 2007. In 2004, around 64% of renewable energy in Norway, then this figure surged to 80% in 2007. The proprotion of renewble energy produced in Iceland recorded growth to nearly 60% in 2004 before declining to 65% in the next three years.