TTM20182017201620152014
Restaurant-level operating margin12.8%12.8%15.5%14.5%14.2%12.6%
Restaurant-level operating margin growth (bps)-278-2789938157-45
Operating margin9.9%9.9%10.7%9.6%9.0%7.8%
Operating margin growth (bps)-82-821076612015
Net profit margin8.3%8.3%6.9%6.5%5.8%4.9%
Net profit margin growth (bps)14314340738449

Notes:Restaurant-level operating margin represents restaurant-level operating income, which equals company-operated restaurants sales minus company-operated restaurant costs, which includes cost of goods sold (food, beverage and packaging), labor, occupancy and other operating costs, expressed as a % of company-operated restaurant sales