The line graph below depicts the porpotion of some seperated age groups of viewers in one city who payed to watch musical events from 2010 to 2015.
Overall, most of them tended to fluctuate at the beginning, maintain during the middle of the period then had a tendency of growing at the end. Despite the trend, the group of people from 55 to 64 seem to decline in the last three years.
Looking into the details, young generation were opposite each other. They both started at 40% but while group aged 16-24 performed a growth to 60%, audience aged 25-44 declined to around 30% at the end of year 2012. The next one-year period, they shared the same as were remaining stable. During the last three year from 2013 to 2015, youngsters exprienced a slight surge to 70%. Meanwhile, grown-ups finished at approximately 50%, after rose 20%.
Other groups which were 45-54, 55-64 and 75 + also fluctuated alot. Especially the group aged 75+ and 45-54, they were opposite as during the first year, 45-54 age group dipped from 52% to 40% while 75+ age group increased ten more percent. After that, they both countinued the trends before maintained during the year 2012 to 2015 and finished at over 50% and around 20% for 75+ in 2015. The only line which was lower than its start is age group 55-64. They started at approximately 25% and ended up at over 20%.