| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 7.22898 |
| 2021 | 1.6994 |
| 2020 | 1.93736 |
| 2019 | 6.39259 |
| 2018 | 6.46719 |
| 2017 | 5.90924 |
| 2016 | 5.61868 |
| 2015 | 5.87785 |
| 2014 | 5.29339 |
| 2013 | 4.42345 |
| 2012 | 4.37956 |
| 2011 | 5.28326 |
| 2010 | 5.29329 |
| 2009 | 4.3185 |
| 2008 | 4.63108 |
| 2007 | 6.10517 |
| 2006 | 5.94617 |
| 2005 | 6.47249 |
| 2004 | 6.44499 |
| 2003 | 5.80546 |
| 2002 | 5.23374 |
| 2001 | 5.10641 |
| 2000 | 5.60128 |
| 1999 | 3.43878 |
| 1998 | 4.29743 |
| 1997 | 6.57065 |
| 1996 | 7.6078 |
| 1995 | 7.67218 |
| 1994 | 6.85036 |
| 1993 | 5.96574 |
| 1992 | 6.41996 |
| 1991 | 3.71912 |
| 1990 | 2.82926 |
| 1989 | 5.02121 |
| 1988 | 2.82549 |
| 1987 | 1.25204 |
| 1986 | 0.422269 |
| 1985 | 1.36835 |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |