The provided illustration elucidates the percentage of renewable energy as part of the total energy supply in Australia, Sweden, Iceland, and Turkey during the period spanning from 1997 to 2010.
Overall, Iceland had the highest reliance on renewable energy sources throughout the timeline, showcasing a consistent increase. In contrast, Australia and Sweden had a lower share of renewable energy which declined over the years. Turkey experienced a fluctuating trend with a drop in renewable energy usage by 2010.
Australia began at just under 10% of renewable energy in 1997 before experiencing a gradual decline to below 5% by 2010. Turkey, on the other hand, started at about 38% in 1997, encountered an increase by 2000, but ultimately decreased to around 32% in 2010.
By contrast, Iceland commenced with an impressive nearly 50% renewable energy usage in 1997, steadily increasing to reach a peak of exactly 70% in 2010. Sweden, having only around 5% renewable energy in 1997, significantly lagged behind Iceland. Nonetheless, Sweden’s renewable energy usage rose to approximately 7% in 2000 and about 9% in 2010.