The given line graph illustrates the proportion of total music sales by three different methods (streams,downloads,CDs) over the 7-year period between 2011 and 2018.
Overall,the percentage of music sales through streams increased dramatically overtaking both downloads and CDs by the end of the period(2018).By contrast,CD purchases declined steadily throughout ,while downloads rose initially before falling after reaching a peak.
Streams accounted for about 5% of total music sales in 2011 and demonstrated a continious upward movement rising to around 42% in 2018. By comparison, downloads accounted for around 35% of total sales at the beginning of the period. This figure climbed to a peak of roughly 43% in 2014 before falling steadily to approximately 30% by the end of the period.The figure rose to approximately 45% in 2014,and then decreased to about 30% at the end of the period.
CD purchases represented the highest proportion of music sales in 2011 at about 55%.However,this percentage suffered a continuous downturn trend and reached the lowest point at 25% in 2018.CDs became the least popular method of buying music by the end of the period