To what extent a nation-state or culture is globalized in a particular year has until most recently been measured employing simple proxies like flows of trade, migration, or foreign direct investment. A more sophisticated approach to measuring globalization is the recent index calculated by the Swiss think tank KOF. The index measures the three main dimensions of globalization: economic, social, and political. In addition to three indices measuring these dimensions, an overall index of globalization and sub-indices referring to actual economic flows, economic restrictions, data on personal contact, data on information flows, and data on cultural proximity is calculated. Data are available on a yearly basis for 122 countries. According to the index, the world's most globalized country is the USA, followed by Canada, the United Kingdom, and France. The least globalized countries according to the KOF-index are Burundi, Belize, and Sierra Leone.