The given information represents the proportion of total music sales by method from 2011 to 2018.
Overall, there was a gradual increase in the percentage of streams, making it the most favored method in 2018, while the opposite was true for CDs purchased. Additionally, the figure for downloads saw a slight fluctuation.
As can be seen, the proportion of CDs purchased was the highest at 55% in 2011, compared to only 5% in the statistics of streams, which was the lowest. However, the figure for streams rose sharply in the next 5 years to the same point with CDs purchased, with nearly 30% in the middle of 2016, then continued to grow to reach the peak of 40% in 2018. A contradicting trend was seen in the percentage of CDs purchased, hitting the lowest point at 25% after 7 years.
In terms of music sales by downloads, the statistics started at 35% in 2011, followed by a dramatic rise to more than 40% in the next 3 years and exceeded those of CDs purchased and streams. Before dropping to the second-highest point at 30% in 2018, the downloads method remained dominant until 2017.