the pie charts provided believe that the percentage pf american online music service users in five different age groups in three different years in 2013 2015 and 2017.
as can be seen from the chart, the proportion of network users who are in 30-39 was came predominant of all in the mentioned group in all three years, whereas in 20-29 age groups was the least significant in previous two years 2013 and 2015 but in 2017 the 50+ age group took the lowest one.
Looking at the first chart, the users in 30-39 was peaked in all years and saw a little growth in each year around 1%. In 2013 this proportion accounted for 31% that was significantly higher than 10-19 age groups that made achieved the lowest point with 5%. Furthermore, 40-49 age groups took the lead of all with in this group with 34% that was higher by 16% when compared with 20-29 age group. Finally the oldest age group 50+ accounted for 12% that saw markedly decrease in the second year which was made up 4%. In 2015 the 20-29 ages in network users saw marginal rise made up 33% that was by far the most significant of all. In addition, this proportion was significantly higher by than 10-19 age group in 2015 that was the least significant im this group woth 4%. Both 30-39 and 20-29 age groups contribute to the same level with 26 % respectively that was a bit higher than 40-49 age group accounted for 14%
The final year in 2017the 20-29 age group was also the most substantial of all with34% that saw a marginal rise after 2015.Nevertheless 50+ age group finally took thenlowest point in the group under discussion accounted for 4% that was 20% lower than 10-19 age group. And this proportion made up the same level with 30-39 age group.