| 年份 | 日本  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 6.04697 | 
| 2021 | 5.9818 | 
| 2020 | 5.98365 | 
| 2019 | 6.00835 | 
| 2018 | 6.04381 | 
| 2017 | 6.16621 | 
| 2016 | 6.37448 | 
| 2015 | 6.63809 | 
| 2014 | 7.06384 | 
| 2013 | 7.61272 | 
| 2012 | 8.09322 | 
| 2011 | 8.22668 | 
| 2010 | 7.94436 | 
| 2009 | 7.49762 | 
| 2008 | 7.03622 | 
| 2007 | 6.63074 | 
| 2006 | 6.52483 | 
| 2005 | 6.70115 | 
| 2004 | 6.72561 | 
| 2003 | 6.54322 | 
| 2002 | 6.354 | 
| 2001 | 6.19373 | 
| 2000 | 6.07984 | 
| 1999 | 6.06293 | 
| 1998 | 6.09501 | 
| 1997 | 6.07566 | 
| 1996 | 5.99195 | 
| 1995 | 5.88463 | 
| 1994 | 5.78845 | 
| 1993 | 5.69916 | 
| 1992 | 5.60423 | 
| 1991 | 5.50645 | 
| 1990 | 5.3922 | 
| 1989 | 5.23093 | 
| 1988 | 5.0021 | 
| 1987 | 4.71114 | 
| 1986 | 4.37694 | 
| 1985 | 4.06377 | 
| 1984 | 3.79731 | 
| 1983 | 3.58455 | 
| 1982 | 3.45777 | 
| 1981 | 3.40474 | 
| 1980 | 3.37709 | 
| 1979 | 3.38659 | 
| 1978 | 3.44031 | 
| 1977 | 3.48753 | 
| 1976 | 3.51481 | 
| 1975 | 3.52562 | 
| 1974 | 3.52889 | 
| 1973 | 3.52739 | 
| 1972 | 3.52469 | 
| 1971 | 3.49544 | 
| 1970 | 3.44376 | 
| 1969 | 3.39017 | 
| 1968 | 3.34811 | 
| 1967 | 3.32805 | 
| 1966 | 3.33848 | 
| 1965 | 3.37011 | 
| 1964 | 3.3808 | 
| 1963 | 3.35918 | 
| 1962 | 3.30482 | 
| 1961 | 3.22273 | 
| 1960 | 3.1396 |