The provided line graph compares the percentage of renewable energy used in six separate nations between 1971 and 2011.
Overall, renewable energy consumption shares experienced an upward trend in most countries surveyed, except for Finland, during the surveyed period. It is also notable that the proportion of green energy use was highest in Finland, as opposed to the UK, throughout the period.
Regarding the top and bottom nations, in 1971, Finland recorded about a quarter of their energy use being sustainable, whereas zero consumption of this kind of energy was witnessed in the UK. In the next 40 years, the figure for Finland experienced constant fluctuations between 18% and 22%, dropping to a low of 16% in circa 1986, beforing recovering to approximate at 24% at the end of the timeline, securing its top-notch position. In the meantime, the figure for the UK showed a steady increase, despite a small fall in about 2008, to end at above 5% in 2011.
Concerning the remaining countries, standing as the second-ranked country in the percentage of sustainable ennergy use in 1971, the figure for Denmark varied largely throught the period, before finally reaching 17% in 2011, falling to the third place. Conversely, although experiencing a relatively similar pattern of Denmark, the figure for the US witnessed a much more dramatic rise, surpassing the figures for Germany, France, and Denmark, to rank second in this regard with about 18% in the final year. The two remaining countries, which are France and Germany, also followed a comparatively resembling trend during the period. While the figure for the former started with around 8% in 1971, recording a marginal slump midway, before ending at below 15% in 2011, that for the latter was initially 5%, which then witnessed a slight drop to 4% in circa 1986, and rose to 14% at the end of the period.