The age interval that far exceeds all the rest for day pass users is: 18-24
As you can see, the 18-24 age group makes up 35% of day pass users, while all other age groups are below 20%.
It is possible that this is because people in this age group are more likely to be budget-conscious and are looking for a way to save money on their bike rides.
This represents a significant difference and suggests that day passes are most popular among young adults.