| 年份 | 日本  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 8.00432 | 
| 2021 | 7.7044 | 
| 2020 | 7.40816 | 
| 2019 | 7.15029 | 
| 2018 | 6.91683 | 
| 2017 | 6.65655 | 
| 2016 | 6.35667 | 
| 2015 | 6.04908 | 
| 2014 | 5.76316 | 
| 2013 | 5.49522 | 
| 2012 | 5.23889 | 
| 2011 | 4.98798 | 
| 2010 | 4.73919 | 
| 2009 | 4.48647 | 
| 2008 | 4.23277 | 
| 2007 | 3.97669 | 
| 2006 | 3.709 | 
| 2005 | 3.4551 | 
| 2004 | 3.23151 | 
| 2003 | 3.04592 | 
| 2002 | 2.8995 | 
| 2001 | 2.7792 | 
| 2000 | 2.6695 | 
| 1999 | 2.58405 | 
| 1998 | 2.51976 | 
| 1997 | 2.44603 | 
| 1996 | 2.3604 | 
| 1995 | 2.27601 | 
| 1994 | 2.19028 | 
| 1993 | 2.09723 | 
| 1992 | 2.00552 | 
| 1991 | 1.9132 | 
| 1990 | 1.82459 | 
| 1989 | 1.73486 | 
| 1988 | 1.64827 | 
| 1987 | 1.56182 | 
| 1986 | 1.48186 | 
| 1985 | 1.41791 | 
| 1984 | 1.35732 | 
| 1983 | 1.29349 | 
| 1982 | 1.22043 | 
| 1981 | 1.14428 | 
| 1980 | 1.07507 | 
| 1979 | 1.01086 | 
| 1978 | 0.949951 | 
| 1977 | 0.894461 | 
| 1976 | 0.847911 | 
| 1975 | 0.8093 | 
| 1974 | 0.775726 | 
| 1973 | 0.749166 | 
| 1972 | 0.721625 | 
| 1971 | 0.693344 | 
| 1970 | 0.668868 | 
| 1969 | 0.641325 | 
| 1968 | 0.610997 | 
| 1967 | 0.582446 | 
| 1966 | 0.560461 | 
| 1965 | 0.548733 | 
| 1964 | 0.5374 | 
| 1963 | 0.520222 | 
| 1962 | 0.507313 | 
| 1961 | 0.498162 | 
| 1960 | 0.488248 |