Please review my Ielts writing task 1 - line graph

The graph below shows the percentage of people in different age groups in one city who attended music concerts between 2010 and 2015.

The line graph illustrates the proportion of the people aged from 16 to over 75 who participated in music concerts over 6 years period.

It is clear that the people from 16 to 44 years old went to music concerts much more than the other groups. In addition, the over-75-year-olds was the lowest age group in each year.

In 2010, the 25 to 44 years old group accounted for over 50%, while the two age groups, including 16 to 24 and 45 to 54 years old, made up the lower percentage at 40%. The proportion of those aged 16 to 24 ascended continually by 70% in 2015. By contrast, there was a decrease of around 10% in the percentage of the 25 to 44 years old and the 45 to 54 years old group in 2011 before rose significantly by over 50% and under 50% in 2015, respectively.

The people from 55 to 64 years old made up over 20% in 2010, while this figure for the over-75-year-olds just under 10%. In the rest of the period, the percentage of those aged 55 to 64 still remained at 20%; by contrast, the figure for those older than 75 grow to reach a peak of nearly 20%.