This is a list of the heads of government of the Group of 8 nations at each G6, G7, G8 summit since the organisation's inception in 1975. The Group consists of the 6-7-8 largest industrialized democracies, Canada, France, Germany, Italy, Japan, Russia, the United Kingdom and the United States. Also in attendance is the President of the European Commission, who represents the European Union. The G8 holds an annual summit, which each nation's head of government attends. Each year the heads of government take turns assuming the presidency, whose job it is to set the agenda for and host the annual summit. The leader who has been in office the longest of the eight leaders is considered the Senior G8 leader.