China, 24 times: in 1989, 1990, 1992, 1993, 1995, 1997, 1999 (joint), 2000, 2001, 2002, 2004, 2005, 2006, 2008, 2009, 2010, 2011, 2013, 2014, 2019 (joint), 2020, 2021, 2022, 2023; Russia (including Soviet Union), 16 times: in 1963, 1964, 1965, 1966, 1967, 1972, 1973, 1974, 1976, 1979, 1984, 1986 (joint), 1988, 1991, 1999 (joint), 2007; United States, 9 times: in 1977, 1981, 1986 (joint), 1994, 2015, 2016, 2018, 2019 (joint), 2024; Hungary, 6 times: in 1961, 1962, 1969, 1970, 1971, 1975; Romania, 5 times: in 1959, 1978, 1985, 1987, 1996; West Germany, twice: in 1982 and 1983; South Korea, twice: in 2012 and 2017; Bulgaria, once: in 2003; Iran, once: in 1998; East Germany, once: in 1968.
China, 24 times: in 1989, 1990, 1992, 1993, 1995, 1997, 1999 (joint), 2000, 2001, 2002, 2004, 2005, 2006, 2008, 2009, 2010, 2011, 2013, 2014, 2019 (joint), 2020, 2021, 2022, 2023; Russia (including Soviet Union), 16 times: in 1963 1964, 1965, 1966, 1967, 1972, 1973, 1974, 1976, 1979, 1984, 1986 (joint), 1988, 1991, 1999 (joint), 2007; United States, 9 times: in 1977, 1981, 1986 (joint), 1994, 2015, 2016, 2018, 2019 (joint), 2024; Hungary, 6 times: in 1961, 1962, 1969, 1970, 1971, 1975; Romania, 5 times: in 1959, 1978, 1985, 1987, 1996; West Germany, twice: in 1982 and 1983; South Korea, twice: in 2012 and 2017; Bulgaria, once: in 2003; Iran, once: in 1998; East Germany, once: in 1968.