The bar chart depicts how much renewable energy in total energy supply used in four countries: Australia, Sweden, Iceland, Turkey from 1997 to 2010.
Looking from an overall perspective, it is readily apparent that there was an upward trend in the use of renewable energy sources in Sweden and Iceland, while Australia and Turkey witnessed a decline. It can also be seen that among the four countries, this type of energy was most popular in Iceland.
The number of renewable energy in total energy supply in Iceland started at 45% in 1997, after which it experience a sharply rise to exact 60% by 2000, before ending the period at 70% in 2010. Meanwhile, in 1997, there was only 5% of the amount of energy produced was generated from natural resources in Sweden. 3 years later, the data crawl to 6% and a final increase to 9% in 2010.
Conversely, 9% of renewable energy in Australia in 1997, with a subsequent decline to 6% in 2000, before ending the period at 4% in 2010. Similarly, the percentage of renewable energy used in Turkey experienced a decline over the years from approximately 37% in 1997 down to just under 35% in 2010.