| 年份 | 日本 |
|---|---|
| 2023 | - |
| 2022 | 11.6227 |
| 2021 | 11.774 |
| 2020 | 11.9157 |
| 2019 | 12.072 |
| 2018 | 12.2406 |
| 2017 | 12.401 |
| 2016 | 12.5451 |
| 2015 | 12.6735 |
| 2014 | 12.7939 |
| 2013 | 12.9022 |
| 2012 | 13.0055 |
| 2011 | 13.1078 |
| 2010 | 13.2004 |
| 2009 | 13.2982 |
| 2008 | 13.3897 |
| 2007 | 13.4639 |
| 2006 | 13.5498 |
| 2005 | 13.6448 |
| 2004 | 13.7511 |
| 2003 | 13.8858 |
| 2002 | 14.0435 |
| 2001 | 14.2015 |
| 2000 | 14.3725 |
| 1999 | 14.5804 |
| 1998 | 14.8124 |
| 1997 | 15.0512 |
| 1996 | 15.2998 |
| 1995 | 15.5908 |
| 1994 | 15.9328 |
| 1993 | 16.3301 |
| 1992 | 16.7876 |
| 1991 | 17.2939 |
| 1990 | 17.8739 |
| 1989 | 18.5368 |
| 1988 | 19.2445 |
| 1987 | 19.9296 |
| 1986 | 20.5629 |
| 1985 | 21.1325 |
| 1984 | 21.6358 |
| 1983 | 22.1041 |
| 1982 | 22.5857 |
| 1981 | 22.8772 |
| 1980 | 23.0966 |
| 1979 | 23.4193 |
| 1978 | 23.6568 |
| 1977 | 23.8152 |
| 1976 | 23.9016 |
| 1975 | 23.9183 |
| 1974 | 23.8639 |
| 1973 | 23.7548 |
| 1972 | 23.617 |
| 1971 | 23.5224 |
| 1970 | 23.5323 |
| 1969 | 23.6178 |
| 1968 | 23.7693 |
| 1967 | 23.9946 |
| 1966 | 24.4992 |
| 1965 | 25.1792 |
| 1964 | 26.0111 |
| 1963 | 27.1215 |
| 1962 | 28.2676 |
| 1961 | 29.0762 |
| 1960 | 29.4943 |