Trade in services records the value of services exchanged between residents and non-residents of an economy, including services provided through foreign affiliates established abroad. This indicator is measured in million USD and percentage of GDP for exports, imports and net trade. Services include transport (both freight and passengers), travel, communications services (postal, telephone, satellite, etc.), construction services, insurance and financial services, computer and information services, royalties and license fees, other business services (merchanting, operational leasing, technical and professional services, etc.), cultural and recreational services, and government services not included in the list above. Trade in services drives the exchange of ideas, know-how and technology, although it is often restricted by barriers such as domestic regulations. All OECD countries compile their data according to the 2008 System of National Accounts (SNA).