A great egg layer can produce up to 300 eggs in the first year. Australorps, Leghorns, Rhode Island Reds and Easter Eggers are examples of great egg layers.
Bantams and Silkies are some of the worst egg layers. They may only provide less than 100 eggs in the first year.
Many things can affect the rate of lay of your hens, including but not limited to: breed, housing, weather, management, parasite load and nutrition.
The estimated number of eggs per year per breed are to be used as a guideline only. Egg production in hens can be affected by many external and internal factors.