TTM20182017201620152014
Restaurant-level operating margin21.6%21.6%21.9%22.2%21.0%20.6%
Restaurant-level operating margin growth (bps)-20-29-3412043-143
Operating margin9.5%9.5%9.4%9.0%5.4%4.9%
Operating margin growth (bps)1844835452-184
Net profit margin7.8%7.4%6.7%5.4%10.5%4.6%
Net profit margin growth (bps)12469127-508594-240

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