Line graph (Can u check for me?)

The line graph illustrates how much percentage of total music sales by 3 different methods such as streams, downloads and CDs purchased.

Overall, as can be seen clearly from the chart that there was a significant decline of the proportion of CDs purchased. However, time witnessed a boom in the portion of Streams which went up steadily and became the most popular at the end of period.

Looking at the details, CDs purchased occupied the largest part in total sales, at around 55%, which 20% more than that of Downloads, and over 10 times as much as the portion of Streams in 2011. Nevertheless, CDs purchased experienced a sharp decline and peaked at less than 30% of total amount.

It was 6 years later that quite an opposite pattern can be seen in Steam's data, which overtook the slice of CDs and reach a peak of more than 40% of all in 2018. Finally, there was a slight increase and decrease in the percentage of Downloads, with over 30% being made up.