As Sinndho said, without any kind of information about the structures and Tables, it's very difficult to advise you on this matter. But for this kind of thing you should have at least two Tables which are linked in a One-to-Many relationship.
The Main Table, or One side of the relationship, would have all of the information on the entrants that you're concerned about having to re-enter each year, things like EntrantID (as Primary Key), name, address, phone number, etc. In other words, the static data.
The Secondary Table, or Many side of the relationship, would contain Fields such as EntrantID (as Foreign Key), date of show, and any other data which changes from year to year.
You would then display the Main Table data in a Main Form, and add a Subform to this Form that is based on the Secondary Table. The two Forms would be linked using the EntrantID, and as you move from one entrant to another the Records in the Subform would change, only displaying those related to the current Main Form Record.
Linq ;0)>