The table shows the two age groups participating in the marathon from 2008 to 2012. Summarize the information by main features, and make comparisons where relevant.
The table compares marathon participation among people aged 18–39 and those aged 40 and above between 2008 and 2012.
Overall, participation rose steadily in both age groups throughout the period, while younger runners consistently formed the larger share. Consequently, the total number of participants increased every year, from 2,000 in 2008 to 2,800 in 2012.
Among 18–39-year-olds, the figure climbed from 1,200 in 2008 to 1,350 in 2009, before reaching 1,500 in 2010. Growth continued over the following two years, with participation rising to 1,600 in 2011 and peaking at 1,750 in 2012. This represented an overall increase of 550 participants.
The 40+ group followed a similar but more moderate pattern. Its number rose from 800 in 2008 to 900 in 2010, then increased further to 950 in 2011 and 1,050 in 2012. Despite this growth, the gap between the two age groups widened slightly, from 400 to 700 participants. Younger adults therefore remained dominant throughout the entire five-year period.