| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.669314 |
| 2020 | 0.242642 |
| 2019 | 0.724495 |
| 2018 | 1.12046 |
| 2017 | 1.00099 |
| 2016 | 0.828043 |
| 2015 | 1.21986 |
| 2014 | 2.85118 |
| 2013 | 3.17048 |
| 2012 | 4.10988 |
| 2011 | 4.58244 |
| 2010 | 3.3933 |
| 2009 | 3.4624 |
| 2008 | 7.24341 |
| 2007 | 6.63828 |
| 2006 | 8.77757 |
| 2005 | 9.04474 |
| 2004 | 8.12321 |
| 2003 | 5.58538 |
| 2002 | 5.28727 |
| 2001 | 5.80549 |
| 2000 | 7.67987 |
| 1999 | 3.72966 |
| 1998 | 1.76177 |
| 1997 | 3.0728 |
| 1996 | 3.55959 |
| 1995 | 3.24928 |
| 1994 | 3.28952 |
| 1993 | 4.15423 |
| 1992 | 4.97222 |
| 1991 | 3.38978 |
| 1990 | 6.0348 |
| 1989 | 2.53824 |
| 1988 | 0.198159 |
| 1987 | 0.0743461 |
| 1986 | 0.00994471 |
| 1985 | - |
| 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 | - |