Through the 2008 Summer Games in Beijing, 15 times:
2004, 2000, 1996, 1984, 1968, 1964, 1952, 1948, 1932, 1928, 1924, 1920, 1912, 1904, 1896
Other countries to win the gold medal count for a Summer Olympic Games are China (2008), Unified Team (1992), USSR (1988, 1980, 1976, 1972, 1960, 1956), Germany (1936), Great Britain (1908), and France (1900).