| Pos. | Year | Number of nations | |
|---|
| 1 | 2009 | 13 | Australia, Canada, France, Germany, Great Britain, Ireland, Italy, Netherlands, New Zealand, Slovenia, Spain, Switzerland, United States |
| 2 | 2013 | 12 | Australia, Belarus, Belgium, Czech Republic, Denmark, France, Ireland, Italy, Netherlands, Spain, Switzerland, United States |
| 3 | 2015 | 12 | Australia, Belgium, Colombia, France, Germany, Ireland, Italy, Luxembourg, Netherlands, Portugal, Slovakia, Spain |
| 4 | 2011 | 11 | Argentina, Australia, Estonia, France, Germany, Great Britain, Ireland, Italy, Slovakia, Spain, Switzerland |
| 5 | 2016 | 11 | Belgium, Colombia, Denmark, France, Great Britain, Italy, Luxembourg, Netherlands, Russia, Spain, Switzerland |
| 6 | 2001 | 10 | Colombia, Czech Republic, Denmark, Germany, Great Britain, Italy, South Africa, Spain, Switzerland, United States |
| 7 | 1999 | 10 | Belgium, France, Germany, Italy, Netherlands, Russia, South Africa, Spain, Switzerland, Ukraine |
| 8 | 2017 | 10 | Austria, Belgium, Colombia, France, Great Britain, Italy, Kazakhstan, Poland, Slovenia, Spain |
| 9 | 2010 | 9 | Belarus, Belgium, France, Great Britain, Italy, Norway, Slovakia, Spain, United States |
| 10 | 1997 | 9 | Czech Republic, Denmark, France, Germany, Italy, Netherlands, Russia, Spain, Switzerland |
| 11 | 1990 | 9 | Belgium, Colombia, Denmark, France, Germany, Netherlands, Norway, Russia, Spain |
| 12 | 2006 | 8 | Germany, Great Britain, Italy, Kazakhstan, Norway, Portugal, Spain, United States |
| 13 | 2012 | 8 | Australia, Belgium, Germany, Great Britain, Italy, Russia, Spain, Sweden |
| 14 | 1995 | 8 | Denmark, France, Germany, Italy, Netherlands, Russia, Spain, Switzerland |
| 15 | 1993 | 8 | Colombia, France, Netherlands, Norway, Spain, Switzerland, Ukraine, Uzbekistan |
| 16 | 1989 | 8 | Belgium, Colombia, Germany, Great Britain, Italy, Netherlands, Russia, Spain |
| 17 | 1980 | 8 | Belgium, France, Germany, Ireland, Italy, Netherlands, New Zealand, Spain |
| 18 | 2014 | 8 | Australia, Canada, Colombia, France, Germany, Italy, Poland, Spain |
| 19 | 2018 | 8 | Australia, Belgium, Canada, France, Great Britain, Italy, Spain, United States |
| 20 | 1998 | 7 | Estonia, Germany, Italy, Netherlands, Russia, Spain, Switzerland |
| 21 | 2005 | 7 | Australia, Denmark, Italy, Netherlands, Norway, Russia, Spain |
| 22 | 2003 | 7 | Colombia, Denmark, Germany, Great Britain, Italy, Spain, Venezuela |
| 23 | 2000 | 7 | Colombia, Italy, Kazakhstan, Netherlands, Russia, Spain, Switzerland |
| 24 | 1996 | 7 | Belgium, Colombia, France, Italy, Netherlands, Russia, Switzerland |
| 25 | 1992 | 7 | Belgium, Colombia, Italy, Netherlands, Spain, Switzerland, Uzbekistan |
| 26 | 1991 | 7 | Colombia, Denmark, Germany, Italy, Netherlands, Russia, Spain |
| 27 | 1988 | 7 | Colombia, Denmark, Great Britain, Ireland, Italy, Netherlands, Spain |
| 28 | 1986 | 7 | Belgium, France, Germany, Great Britain, Ireland, Russia, Spain |
| 29 | 1985 | 7 | Belgium, Colombia, Ireland, Italy, Netherlands, Russia, Spain |
| 30 | 2007 | 6 | Colombia, Germany, Italy, Russia, Spain, United States |
| 31 | 2008 | 6 | Belgium, Denmark, France, Italy, Spain, United States |
| 32 | 1994 | 6 | Colombia, France, Italy, Netherlands, Spain, Switzerland |
| 33 | 1987 | 6 | Belgium, Colombia, France, Ireland, Italy, Spain |
| 34 | 1976 | 6 | Belgium, Germany, Luxembourg, Netherlands, Portugal, Spain |
| 35 | 1968 | 6 | Belgium, Germany, Great Britain, Italy, Netherlands, Spain |
| 36 | 1967 | 6 | Belgium, France, Germany, Great Britain, Netherlands, Spain |
| 37 | 1962 | 6 | France, Germany, Ireland, Italy, Netherlands, Spain |
| 38 | 2004 | 5 | Colombia, Italy, Russia, Spain, United States |
| 39 | 1984 | 5 | Belgium, France, Germany, Italy, Spain |
| 40 | 1983 | 5 | Australia, Belgium, France, Italy, Spain |
| 41 | 1981 | 5 | Denmark, France, Italy, Netherlands, Spain |
| 42 | 1979 | 5 | Belgium, France, Ireland, Netherlands, Spain |
| 43 | 1978 | 5 | Belgium, France, Italy, Netherlands, Spain |
| 44 | 1975 | 5 | Australia, Belgium, Italy, Netherlands, Spain |
| 45 | 1974 | 5 | Belgium, France, Netherlands, Portugal, Spain |
| 46 | 1970 | 5 | Belgium, France, Luxembourg, Netherlands, Spain |
| 47 | 1969 | 5 | Belgium, France, Great Britain, Italy, Spain |
| 48 | 1964 | 5 | Belgium, France, Great Britain, Netherlands, Spain |
| 49 | 1963 | 5 | Belgium, France, Ireland, Netherlands, Spain |
| 50 | 1956 | 5 | Belgium, France, Italy, Spain, Switzerland |
| 51 | 2002 | 4 | Colombia, Italy, Russia, Spain |
| 52 | 1982 | 4 | Belgium, France, Spain, Sweden |
| 53 | 1977 | 4 | Belgium, Italy, Netherlands, Spain |
| 54 | 1973 | 4 | Belgium, France, Netherlands, Spain |
| 55 | 1971 | 4 | Belgium, France, Netherlands, Spain |
| 56 | 1966 | 4 | Argentina, Italy, Netherlands, Spain |
| 57 | 1965 | 4 | Belgium, France, Germany, Spain |
| 58 | 1961 | 4 | Belgium, France, Portugal, Spain |
| 59 | 1959 | 4 | Belgium, France, Portugal, Spain |
| 60 | 1958 | 4 | Belgium, France, Italy, Spain |
| 61 | 1957 | 4 | Belgium, France, Italy, Spain |
| 62 | 1947 | 4 | Belgium, France, Italy, Spain |
| 63 | 1935 | 4 | Austria, Belgium, Italy, Spain |
| 64 | 1972 | 3 | Belgium, Netherlands, Spain |
| 65 | 1960 | 3 | Belgium, Italy, Spain |
| 66 | 1955 | 3 | France, Italy, Spain |
| 67 | 1950 | 3 | Belgium, Italy, Spain |
| 68 | 1948 | 3 | Belgium, Italy, Spain |
| 69 | 1946 | 3 | Netherlands, Portugal, Spain |
| 70 | 1936 | 3 | Belgium, Italy, Spain |
| 71 | 1945 | 2 | Portugal, Spain |
| 72 | 1942 | 2 | France, Spain |
| 73 | 1941 | 1 | Spain |
