The three pies illustrate American online music service users by age group in 2013, 2015, and 2017.
Overall, it is clear that the percentage of users from all five age groups fluctuated considerably over the three year period. People from 40 to 49 age group accounted for the largest category in 2013. However, this figure replaced by the 30-39 age group in 2015. In contrast, the 20 to 29 year old users stood out as the largest category in 2017.
Looking at the charts more closely, one can see that the 40-49 year old group stayed at 34 percent in 2013. However, this figure dropped to 14 percent in 2017. On the other hand, 18 percent of users came from people who were from 20 to 29 years old, it contiually increased to 34 percent in 2017. Moreover, the 10-19 age group remained stable the smallest category in 2013 and 2015 and then it became the seconed biggest category in 2017, reaching 24 percent of total. While the proportion of 30 to 39 year olds stayed at 31 percent in 2013 and it solwly rose to 33 perincer after two years, this portion had declined to 24 percnet by 2017. The users over 50 remained stable at 12 percent and 11 percent in 2013 and 2015. However it made up the smallest category at 4 percent in 2017.
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