“Souvenirs and Such” is a gift shop in Niagara Falls. Last year 22% of its revenue came from the sale of clothing, 18% from food items, 32% from novelty items, and the remainder from special services the shop provided for tourists. This past year the shop experienced a 5% increase in the sale of clothing, a 2% increase in the sale of food items, a 9% drop in novelty items, and a 2% drop in special services. What is the shop’s average change in revenue for this year?