Entering info once for several value lists

I'm working on a database that included 5 tasks that will be checked and initialed by the worker that competes them. We want them to choose their initials from a drop down list.

For each of the 5 tasks, there needs to be a drop down list with a list of initials to choose from. I want to keep the list of initials consistent without having to add/delete 5 times every time there is employee turnover.

Is there a way to maintain one list of initials that is used independently by 5 value lists?

Thanks!