Governments can choose to spend their money on a variety of goods and services, from providing child care to building bridges to subsidising alternative energy sources. For OECD member countries that are members of the European Union, common policy goals regarding economic growth, agriculture, energy, infrastructure, and research and development (among others) may also affect the structure of expenditures. The variance among countries in expenditures as a share of GDP is mainly explained by political differences about the role of government in providing social protections (unemployment insurance, old age pensions and disability benefits). When government spending on social protection is excluded, expenditures range between 20% and 30% of GDP in all countries. Social protection is the largest category of expenses in all but three countries: Korea spends the most on economic affairs whereas the United States and Iceland spend more on health than any other government function.