The provided chart illustrates the proportion of renewable energy usages in different six nations in the period of four decades, from 1971 to 2011.
Overall, it is apparent that there was an escalation in using renewable resources in the United States as well as a constant increase in the other three countries: Denmark, France, Germany.
As can be seen from the graph, although the using renewable energy between 1971 and 2011 in Finland was a bit erratic, it still ranked at the top of the list, at roughly 24%. The United States showed an incredible attempt in socializing this kind of energy, started at merely 0.25%, but it bounced to approximately 19% and reached the second level following closely to Finland.
Denmark, France, and Germany all followed the almost identical patterns, dropping to their bottom in 1986, before substantially growing until the end of the timeframe. The UK, where renewable power resources was a bit more popular in 2011, was still using recycle resources at the lowest amount compared to the other countries in the frame.