| 年份 | 日本 |
|---|---|
| 2023 | - |
| 2022 | 21.7108 |
| 2021 | 21.4261 |
| 2020 | 20.9975 |
| 2019 | 19.9451 |
| 2018 | 19.5637 |
| 2017 | 19.4118 |
| 2016 | 19.6572 |
| 2015 | 19.6177 |
| 2014 | 19.9262 |
| 2013 | 19.8544 |
| 2012 | 19.9573 |
| 2011 | 19.8854 |
| 2010 | 19.2026 |
| 2009 | 19.3337 |
| 2008 | 18.025 |
| 2007 | 17.6343 |
| 2006 | 17.5951 |
| 2005 | 17.7439 |
| 2004 | 17.7234 |
| 2003 | 17.8365 |
| 2002 | 17.7749 |
| 2001 | 17.229 |
| 2000 | 16.5492 |
| 1999 | 16.2168 |
| 1998 | 15.6654 |
| 1997 | 15.3019 |
| 1996 | 15.1459 |
| 1995 | 15.0797 |
| 1994 | 14.7483 |
| 1993 | 14.3484 |
| 1992 | 13.7426 |
| 1991 | 13.3603 |
| 1990 | 13.3193 |
| 1989 | 13.3367 |
| 1988 | 13.47 |
| 1987 | 13.8581 |
| 1986 | 13.9203 |
| 1985 | 13.9959 |
| 1984 | 14.3079 |
| 1983 | 14.5278 |
| 1982 | 14.4875 |
| 1981 | 14.3721 |
| 1980 | 14.3505 |
| 1979 | 14.1832 |
| 1978 | 14.1322 |
| 1977 | 14.3731 |
| 1976 | 14.4136 |
| 1975 | 14.6811 |
| 1974 | 13.3345 |
| 1973 | 12.137 |
| 1972 | 11.9294 |
| 1971 | 11.6367 |
| 1970 | 10.8774 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |