| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 1.07138 |
| 2020 | 1.13182 |
| 2019 | 1.18373 |
| 2018 | 1.38164 |
| 2017 | 1.49937 |
| 2016 | 1.21932 |
| 2015 | 1.37936 |
| 2014 | 1.81738 |
| 2013 | 1.58013 |
| 2012 | 1.70004 |
| 2011 | 1.82593 |
| 2010 | 1.83564 |
| 2009 | 1.98133 |
| 2008 | 2.45497 |
| 2007 | 2.22786 |
| 2006 | 1.50786 |
| 2005 | 1.2713 |
| 2004 | 1.53103 |
| 2003 | 1.91291 |
| 2002 | 1.70669 |
| 2001 | 1.53843 |
| 2000 | 1.64232 |
| 1999 | 1.70948 |
| 1998 | 2.63589 |
| 1997 | 2.54638 |
| 1996 | 3.35994 |
| 1995 | 3.89338 |
| 1994 | 3.37037 |
| 1993 | 3.45589 |
| 1992 | 5.05412 |
| 1991 | 4.331 |
| 1990 | 5.74022 |
| 1989 | 6.14258 |
| 1988 | 1.46986 |
| 1987 | 1.07681 |
| 1986 | 1.32433 |
| 1985 | 1.69632 |
| 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 | - |