The provided graph illustrates the percentage of renewable energy in total energy supply in 04 distinct nations in 03 years 1997, 2000 and 2010.
Overall, there was a rise witnessed in the percentage of renewable energy in Sweden and Iceland, while the opposite trend was true for the figure for Australia and Turkey. In addition, that of Iceland was always the highest.
The proportion of renewable energy in total energy supply in Iceland increase remarkably from appiroximately 45% in 1997 to 60% in 2000 and final increase to 70% in 2010. Meanwhile, in 1997, there was a slight rise in the proportion of renewable energy in Sweden, from nearly 5% in the first year to approximately 10% in 2010.
A slow fall was seen in the percentage of renewable energy in Australia, from appiroximately 9% in the first year, after that drop to about 6% in 2000 and before ending the period decline nearly 4% in 2010. Similarly, the percentage of renewable energy in Turkey experienced a minimal decline over the years from approximately 37% in 1997 down to just under 35% in 2010.