The given line graph illustrates the proportion of people in different age cohorts in a city attending music concerts over a five-year period commencing from 2010.
Overall, the percentage of people aged 55-64 partaking in music concerts witnessed a decrease over the period shown, while that of the others increased by varying degrees. It is also clear that the participation in music concerts among the age group 16-24 ended up with the highest figure.
The age group of 45-54 was initially the most likely to attend music concerts, with over half of this group attending there, after which it sank to the trough of 40% in 2011 before ending the period at 53% in 2015. Besides, the figure for the youngest age bracket increased slightly from 40% in 2010 to 45% in mid-2010, surpassing that of the 45-54 bracket and reaching the highest point of 70% in 2015.
Turning to the 25-44 and 55-64 cohorts, 40% people of the former attended music concerts in 2010, with a subsequent dramatic decrease to a bottom of 30% in 2012 and a final rapid increase to 48% in 2015. The trajectory observed in the 55-64 age demographic follows a contrasting pattern compared to the trend seen in the 25-44 age cohort. Commencing with the figure of 25%, the participation rate in music concerts of the 25-44 age group showed negligible increase to 30% in 2012 before plunging to 19% in 2015.
Finally, the figure for the oldest age group started with the lowest figure of 10%, after which it saw a significant rise to 22% in 2011, representing a two-fold increase from the first year provided, which is the most pronounced change of the whole graph. Following this, it decreased drastically to 9% in 2013 before going up to 2% in 2015.