| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 8.01708 |
| 2021 | 8.06973 |
| 2020 | 8.11847 |
| 2019 | 8.15976 |
| 2018 | 8.19289 |
| 2017 | 8.21008 |
| 2016 | 8.21072 |
| 2015 | 8.20529 |
| 2014 | 8.1864 |
| 2013 | 8.15554 |
| 2012 | 8.09887 |
| 2011 | 7.98363 |
| 2010 | 7.81293 |
| 2009 | 7.60576 |
| 2008 | 7.35894 |
| 2007 | 7.09076 |
| 2006 | 6.86545 |
| 2005 | 6.72609 |
| 2004 | 6.67295 |
| 2003 | 6.68656 |
| 2002 | 6.7487 |
| 2001 | 6.74105 |
| 2000 | 6.71403 |
| 1999 | 6.75689 |
| 1998 | 6.77629 |
| 1997 | 6.77799 |
| 1996 | 6.8166 |
| 1995 | 6.77896 |
| 1994 | 6.65343 |
| 1993 | 6.49149 |
| 1992 | 6.28835 |
| 1991 | 6.07582 |
| 1990 | 5.88935 |
| 1989 | 5.72851 |
| 1988 | 5.48428 |
| 1987 | 5.13184 |
| 1986 | 4.81114 |
| 1985 | 4.51879 |
| 1984 | 4.15391 |
| 1983 | 3.91127 |
| 1982 | 3.83959 |
| 1981 | 3.8214 |
| 1980 | 3.83233 |
| 1979 | 3.87776 |
| 1978 | 3.94619 |
| 1977 | 4.02984 |
| 1976 | 4.14464 |
| 1975 | 4.29323 |
| 1974 | 4.47339 |
| 1973 | 4.68871 |
| 1972 | 4.91314 |
| 1971 | 5.09345 |
| 1970 | 5.20925 |
| 1969 | 5.26773 |
| 1968 | 5.25978 |
| 1967 | 5.20327 |
| 1966 | 5.16286 |
| 1965 | 5.18045 |
| 1964 | 5.24784 |
| 1963 | 5.36369 |
| 1962 | 5.5186 |
| 1961 | 5.65041 |
| 1960 | 5.74624 |