| 年份 | 日本 |
|---|---|
| 2023 | - |
| 2022 | 1.07773 |
| 2021 | 1.0183 |
| 2020 | 1.01783 |
| 2019 | 0.992231 |
| 2018 | 0.962497 |
| 2017 | 0.913229 |
| 2016 | 0.929517 |
| 2015 | 0.947284 |
| 2014 | 0.957801 |
| 2013 | 0.940539 |
| 2012 | 0.956762 |
| 2011 | 0.974824 |
| 2010 | 0.949033 |
| 2009 | 0.97297 |
| 2008 | 0.907855 |
| 2007 | 0.884987 |
| 2006 | 0.902988 |
| 2005 | 0.916917 |
| 2004 | 0.926604 |
| 2003 | 0.940047 |
| 2002 | 0.940358 |
| 2001 | 0.931673 |
| 2000 | 0.915986 |
| 1999 | 0.945248 |
| 1998 | 0.938595 |
| 1997 | 0.920438 |
| 1996 | 0.911247 |
| 1995 | 0.916877 |
| 1994 | 0.922872 |
| 1993 | 0.950664 |
| 1992 | 0.948312 |
| 1991 | 0.940822 |
| 1990 | 0.941792 |
| 1989 | 0.940781 |
| 1988 | 0.949709 |
| 1987 | 0.965511 |
| 1986 | 0.962811 |
| 1985 | 0.959398 |
| 1984 | 0.958404 |
| 1983 | 0.952297 |
| 1982 | 0.926376 |
| 1981 | 0.916648 |
| 1980 | 0.906794 |
| 1979 | 0.907392 |
| 1978 | 0.891286 |
| 1977 | 0.890681 |
| 1976 | 0.891651 |
| 1975 | 0.907387 |
| 1974 | 0.862068 |
| 1973 | 0.815014 |
| 1972 | 0.842475 |
| 1971 | 0.824119 |
| 1970 | 0.77323 |
| 1969 | 0.772551 |
| 1968 | 0.793867 |
| 1967 | 0.83623 |
| 1966 | 0.879421 |
| 1965 | 0.899714 |
| 1964 | 0.875046 |
| 1963 | 0.902912 |
| 1962 | 0.882982 |
| 1961 | 0.91666 |
| 1960 | 1.08059 |