The line graph shows the percentage of renewable energy generation over total energy produced in 6 countries from 2010 to 2013. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

Presented for consideration is a line graph detailing figures for the usage of renewable energy accounting the sum energy in six different nations in a period of 40 years. It can be clearly seen that from 1971 to 1991, the figures dramatically fluctuated; however after 1991, the consumption of energy climbed gradually, excepted for the United States. To begin with, the expenditure of renewable energy was tremendously votilated throughout the first 20 years. In 1971, Finland was recorded at the highest rank with just under 25%, followed by nearly 15% of Denmark and approximately 10% of France. Moreover, the statistics for Germany, United States, United Kingdom were 5%, about 3%, and roughly 1%, sequentially. After fluctuating, the percentage of Finland reduced significantly to around 16%; by contrast, the rate of 5 other countries increased significantly. In terms of the period after 1991, the proportion of all nations inclined. Specifically, the ratio of United States consumers rocketed to the second position, by approximately 15%. On the contrary, the statistics for the 5 remaining countries steadily rose.