The given three pie charts illustrate the proportion of online music service users divided into five age groups in 2013, 2015, and 2017, in US. Overall, users less than 20-29 age groups reperesented changes which had increased insistently, while they more than 30-39 age groups showed decline for 2013 and 2017.
The main trend that can be observed from the data is that users in 10-19 age group showed the largest increase between 2013 and 2017, reaching 24 percentage which was fivefold 2013 feature that was 5%, while users in more than 50 age group represented the largest decrease for 2013 and 2017, with only 4%, which was a third of 2013 proportion that was 12%.
Moreover, users in 30-39 age group started at 31% in 2013, but had recovery by 2%, reaching 33%, and then dropped again until 24%. with it’s features fluctating. Also, proportion of users in 40-49 age group dropped continuously for three years. although the group occupied 34% in 2013, it fall to 26% and reached 14%, which declined by 12%.