The given line graph illustrates the percentages of renewable energy usage in six different parts of the world between 1971 and 2011.
Overall, it is manifest that despite wild fluctuations throughout the period, all countries managed to retain their former rank, with the sole exception of the US, which followed an increase from a penultimate place to a runner-up. Notably, all given countries recorded an upward trend, except for Finland, which still maintained its dominance.
Looking first at the power consumption of European countries, Finland consistently reported the highest figures between 15 and 25. This figure was closely followed by Denmark, which experienced a series of fluctuations from 1971 to 1996, before moderately increasing to around 17. Similarly, France climbed rapidly to around 11 before bouncing back to the previous number by 1986. Over the next half of the timeframe, the figure for energy utilization in France tapered off. Germany and the UK showed relatively comparable patterns of growth, reaching the penultimate and ultimate ranks, respectively.
The US, by contrast, showed the highest increase by far. Starting at just around 3, the number climbed dramatically, surpassing Germany, France, and Denmark to reach a high of just below 20.