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The three pie charts compare the proportion of online music service users by five age groups during the period from 2013 to 2017. On the whole, it is noticeable that the proportion of users aged 40-49 and over 50s fell over the 4-year period, while users aged 20-29 increased steadily. Also, The age group that accounts for the largest proportion of users was different in 2013, 2015, 2017. Looking at charts more closely, those aged 40-49 made up the largest proportion of users in 2013, but decreased from 34% in 2013 to 14% in 2017. Those aged over 50s also saw a decrease from 12% in 2013 to 4% in 2017, which made up the smallest proportion of users. In contrast, There were an increase in the users aged 10-19 and 20-29, which made up the largest proportions of users in 2017, rising to 24% and 34% respectively.The proportion of users aged 30-39 fluctuated over the 4-year period, from 31% to 24%, and made up the largest proportions in 2015.
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