| 年份 | 日本 |
|---|---|
| 2023 | - |
| 2022 | 29.9246 |
| 2021 | 29.7871 |
| 2020 | 29.5832 |
| 2019 | 29.2798 |
| 2018 | 28.9017 |
| 2017 | 28.464 |
| 2016 | 27.9459 |
| 2015 | 27.3282 |
| 2014 | 26.527 |
| 2013 | 25.5815 |
| 2012 | 24.6475 |
| 2011 | 23.9778 |
| 2010 | 23.6005 |
| 2009 | 23.1659 |
| 2008 | 22.5818 |
| 2007 | 21.9407 |
| 2006 | 21.2573 |
| 2005 | 20.6044 |
| 2004 | 20.0611 |
| 2003 | 19.5688 |
| 2002 | 19.0246 |
| 2001 | 18.4194 |
| 2000 | 17.8049 |
| 1999 | 17.2238 |
| 1998 | 16.6571 |
| 1997 | 16.0813 |
| 1996 | 15.5088 |
| 1995 | 14.9632 |
| 1994 | 14.4403 |
| 1993 | 13.9231 |
| 1992 | 13.4123 |
| 1991 | 12.8982 |
| 1990 | 12.3997 |
| 1989 | 11.9419 |
| 1988 | 11.5411 |
| 1987 | 11.1839 |
| 1986 | 10.8552 |
| 1985 | 10.5414 |
| 1984 | 10.265 |
| 1983 | 10.038 |
| 1982 | 9.80246 |
| 1981 | 9.54835 |
| 1980 | 9.29872 |
| 1979 | 9.04157 |
| 1978 | 8.77988 |
| 1977 | 8.52614 |
| 1976 | 8.28451 |
| 1975 | 8.06566 |
| 1974 | 7.86029 |
| 1973 | 7.66965 |
| 1972 | 7.48132 |
| 1971 | 7.31966 |
| 1970 | 7.1977 |
| 1969 | 7.07709 |
| 1968 | 6.93841 |
| 1967 | 6.77636 |
| 1966 | 6.5885 |
| 1965 | 6.41984 |
| 1964 | 6.28864 |
| 1963 | 6.15143 |
| 1962 | 6.02458 |
| 1961 | 5.91246 |
| 1960 | 5.79927 |