| 年份 | 日本 |
|---|---|
| 2023 | - |
| 2022 | 51.4005 |
| 2021 | 51.3953 |
| 2020 | 51.3899 |
| 2019 | 51.381 |
| 2018 | 51.3683 |
| 2017 | 51.3554 |
| 2016 | 51.3438 |
| 2015 | 51.3344 |
| 2014 | 51.3252 |
| 2013 | 51.3154 |
| 2012 | 51.305 |
| 2011 | 51.293 |
| 2010 | 51.2784 |
| 2009 | 51.2602 |
| 2008 | 51.2392 |
| 2007 | 51.2168 |
| 2006 | 51.1926 |
| 2005 | 51.1649 |
| 2004 | 51.135 |
| 2003 | 51.1053 |
| 2002 | 51.0761 |
| 2001 | 51.0481 |
| 2000 | 51.0208 |
| 1999 | 50.9938 |
| 1998 | 50.9668 |
| 1997 | 50.9415 |
| 1996 | 50.9185 |
| 1995 | 50.8957 |
| 1994 | 50.8741 |
| 1993 | 50.8542 |
| 1992 | 50.8356 |
| 1991 | 50.818 |
| 1990 | 50.8011 |
| 1989 | 50.7858 |
| 1988 | 50.7727 |
| 1987 | 50.7608 |
| 1986 | 50.749 |
| 1985 | 50.7374 |
| 1984 | 50.7259 |
| 1983 | 50.7145 |
| 1982 | 50.7042 |
| 1981 | 50.695 |
| 1980 | 50.6871 |
| 1979 | 50.6823 |
| 1978 | 50.6812 |
| 1977 | 50.6836 |
| 1976 | 50.6896 |
| 1975 | 50.6996 |
| 1974 | 50.715 |
| 1973 | 50.7332 |
| 1972 | 50.7509 |
| 1971 | 50.768 |
| 1970 | 50.7852 |
| 1969 | 50.8015 |
| 1968 | 50.8168 |
| 1967 | 50.8304 |
| 1966 | 50.839 |
| 1965 | 50.846 |
| 1964 | 50.855 |
| 1963 | 50.864 |
| 1962 | 50.872 |
| 1961 | 50.8799 |
| 1960 | 50.8866 |