Egg count sounds right to me. The hens do slow down egg production as they age.
From Purinamills.com.
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During summer heat they can lay less because they eat less feed.
I keep up egg production by giving them a treat of wet mash made with cold water and chicken feed when temps go above 80 F.
I give a quarter cup of feed per chicken before adding water and add an equal amount of cold water and serve in a shady spot early afternoon.
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I replace a treat of Scratch Grains with the wet mash during summer heat.
Try replacing the mealworms with a wet mash.
GC