| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 7.47599 |
| 2021 | 7.40313 |
| 2020 | 7.34253 |
| 2019 | 7.29212 |
| 2018 | 7.25388 |
| 2017 | 7.21588 |
| 2016 | 7.14397 |
| 2015 | 7.03827 |
| 2014 | 6.91233 |
| 2013 | 6.76406 |
| 2012 | 6.60393 |
| 2011 | 6.48034 |
| 2010 | 6.42829 |
| 2009 | 6.44321 |
| 2008 | 6.50075 |
| 2007 | 6.58373 |
| 2006 | 6.58652 |
| 2005 | 6.55908 |
| 2004 | 6.57418 |
| 2003 | 6.5493 |
| 2002 | 6.50341 |
| 2001 | 6.4835 |
| 2000 | 6.38781 |
| 1999 | 6.22095 |
| 1998 | 6.03239 |
| 1997 | 5.81372 |
| 1996 | 5.59547 |
| 1995 | 5.4124 |
| 1994 | 5.26542 |
| 1993 | 5.05853 |
| 1992 | 4.77007 |
| 1991 | 4.51449 |
| 1990 | 4.27981 |
| 1989 | 3.97576 |
| 1988 | 3.76723 |
| 1987 | 3.69097 |
| 1986 | 3.65599 |
| 1985 | 3.65008 |
| 1984 | 3.67274 |
| 1983 | 3.72132 |
| 1982 | 3.7962 |
| 1981 | 3.90011 |
| 1980 | 4.03167 |
| 1979 | 4.18099 |
| 1978 | 4.35776 |
| 1977 | 4.55029 |
| 1976 | 4.71173 |
| 1975 | 4.81892 |
| 1974 | 4.86897 |
| 1973 | 4.85621 |
| 1972 | 4.79718 |
| 1971 | 4.7468 |
| 1970 | 4.74008 |
| 1969 | 4.77023 |
| 1968 | 4.83741 |
| 1967 | 4.93457 |
| 1966 | 5.01773 |
| 1965 | 5.06296 |
| 1964 | 5.08112 |
| 1963 | 5.072 |
| 1962 | 5.04191 |
| 1961 | 5.02079 |
| 1960 | 5.05002 |