The line graph indicates the proportion of total music sales by streams, downloads and CDs from 2011 to 2018.
As an overall trend, the proportion of total music sales by CDs and Downloads decreased, while Streams increased and most popular in 2018.
Getting back to the details, the proportion of total music sales by CDs was the highest with about 65% in 2011, while Downloads and Streams just 35% and 5% respectively. However, the next 3 years, the percentage for CD went down to 40% in 2014. In comparison to the percentage for Downloads, which went up to above 40% and CDs continued rise to above 10% at the same period.
In 2018, the figure for CDs and Downloads decreased to around 25% and 30%, while an opposite trend is Streams was the most popular method of buy music gradual increased to about 40% at this time. 
The line graph indicates the proportion of total  
music
 sales by  
streams
,  
downloads
 and  
CDs
 from 2011 to 2018.
As an  
overall
 trend, the proportion of total  
music
 sales by  
CDs
 and  
Downloads
 decreased, while  
Streams
 increased and most popular in 2018.
Getting back to the  
details
, the proportion of total  
music
 sales by  
CDs
 was the highest with about 65% in 2011, while  
Downloads
 and  
Streams
  just
 35% and 5%  
respectively
.  
However
, the  
next
 3 years, the percentage for CD went down to 40% in 2014.  
In comparison
 to the percentage for  
Downloads
, which went up to above 40% and  
CDs
 continued rise to above 10% at the same period.
In 2018, the figure for  
CDs
 and  
Downloads
 decreased to around 25% and 30%, while an opposite trend is  
Streams
 was the most popular method of  
buy
  music
 gradual increased to about 40% at this time.