The line graph provides the proportion of European inhabitants who worked out at the gym at least one a month, categorized into age cohorts, from 1990 to 2010. Overall, the percentage of all age groups saw an increase over the years. Moreover, younger age groups had a tendency to go to the gym more than the older ones.
Focusing on the workout habit of the two youngest groups, the rate of the 18–24 age group started at 10% in 1990, then dramatically soaring to its peak of nearly 60% in 2006, and hovered around this level in four years later. Similarly, the figure for people aged 25-34 began at the same level of the younger cohort, followed by experiencing a constant surge of nearly 10% every four years to peak at 50% by 2010.
In contrast, the older age cohorts displayed a less favorable trend. The percentages were similar in the two age groups of 35–44 and 45 and over, at roughly 5% in 1990, then the 35–44 group saw a moderate rise to over 10% in 1998. This figure continued to soar significantly, reaching its highest point at 40% in the end of the given period. However, the oldest age cohort just witnessed a slow increase from about 5% to roughly 10% in 16 years, before seeing its sudden leap at 20% in 2010 while remaining the lowest throughout the period.