The chart shows the proportion of renewable energy in total energy supply in four countries from 1997 to 2010

The bar chart gives information about the numbers of renewable energy used in Australia, Sweden, Turkey and Iceland in three years: 1997, 2000 and 2010.
As can be seen from the chart, renewable energy consumption in Sweden and Iceland were increased, but the opposite were true for Australia and Turkey. In addition, Iceland had the highest renewable energy used in four countries and over the period shown.
In 1997, renewable energy was used popularly in Iceland, according to approximately 50%, followed by 38% in Turkey. However, this energy was not very common in Australia and Sweden, with 9% and 5% respectively.
In 2010, renewable energy used in Iceland increased and ranked top at the end, according to 71%. Similarly, the quantities of this energy consumption was increase to 10% in Sweden. In contrast, the used of this energy source in Australia and Turkey became decreased, with 4% and 35% respectively.