The line graph provides information about the consumption of sustainable energy as a proportion of total energy over the period between 1971 and 2011.
In general, use of green energy grew dramatically in United States over the whole period. In Finland, it experienced minor variations yet consistently held the highest level. Another notable trend is that, in Denmark, the utilization of power witnessed constant ups and downs.
The renewable energy usage in US started at just 3 in 1971 and this was followed by a considerably rise. Over the next few years, the figure rose noticeably and reached around 9 by 1991. Despite a significant increase, it dropped suddenly to 5 in 1992. After decreased dramatically in 1992, application of clear energy rose quickly. In Finland and Denmark, consumption of green energy experienced continuous fluctuations. However, in Finland, utilization of energy consistently outperformed the others, reaching 23.
Starting at 7 in France in 1971, use of energy source went up slightly, reaching 12 in 1976. At the end of the timeframe, the figure had risen sharply to 15 . In Germany, at the beginning use of electricity stayed unchanged but then it grew markedly 5 to 17 in 2011. In the United Kingdom, the figure started at a low level and showed only negligible fluctuations throughout the period. By 2011, it had reached just 6, which made it the lowest among all the countries.