The line graph illustrates the proportion of individuals from various age groups in a specific city who participated in music concerts from 2010 to 2015. Overall, the percentage of the youngest people seems to dominate the other. There was a humble change in almost every category, except for the data of individuals between 55 and 64 years old. Regarding the people in their spring-time age and those between 25 and 44 years old. In the first year of the period, while the former rose from about 40% to approximately 55%, surpassing the latter to rank first, the opposite trend in the data for the latter, around 52%, bottomed out at 40%. From then on, more and more young people attended music concerts, evidenced by the data of former continued upward trend and peaked at about 68%. The latter bounces back to its original statistic and remains the same, around 53%. For the other category, the percentage of people aged 55 to 75 fluctuated between 15% and 25% throughout the entire period. The rate of the remaining group plateaued at approximately 40% and peaked at about 48%.