The graph shows the rates of participation in three different activities in a UK sports club between 1983 and 2003. Write a report for a university lecturer describing the information.

The line graph illustrates changes in the proportion of club members participating in swimming, team sports and gym activities at a UK sports club between 1983 and 2003. Overall, participation in swimming declined markedly over the period, while gym activities experienced a significant rise. In contrast, team sports remained relatively stable, despite some minor fluctuations. […]