Gifts R Us is a gift shop in Victoria, British Columbia. Last year, 22% of its revenue came from clothing sales, 15% came from food items, 32% came from novelty items and the rest came from magazines and books. During the past year the business experienced a 5% increase in clothing sales, a 2% increase in food items, a 9% drop in novelty items and a 2% drop in magazine and book sales. The average percent change in revenue during the past year was _____%. Don't forget to include the negative (-) sign if the per cent change was negative.