| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.0696331 |
| 2020 | 0.0702234 |
| 2019 | 0.0708314 |
| 2018 | 0.0732461 |
| 2017 | 0.0743175 |
| 2016 | 0.0751451 |
| 2015 | 0.0759594 |
| 2014 | 0.0702523 |
| 2013 | 0.0711528 |
| 2012 | 0.071682 |
| 2011 | 0.0728655 |
| 2010 | 0.0736452 |
| 2009 | 0.0728467 |
| 2008 | 0.0733961 |
| 2007 | 0.0744388 |
| 2006 | 0.0756148 |
| 2005 | 0.0764715 |
| 2004 | 0.078598 |
| 2003 | 0.0807724 |
| 2002 | 0.0818429 |
| 2001 | 0.0833022 |
| 2000 | 0.0784799 |
| 1999 | 0.0768013 |
| 1998 | 0.0747195 |
| 1997 | 0.0745215 |
| 1996 | 0.0741062 |
| 1995 | 0.073252 |
| 1994 | 0.0753644 |
| 1993 | 0.0774976 |
| 1992 | 0.0788952 |
| 1991 | 0.0785268 |
| 1990 | 0.0797906 |
| 1989 | 0.0824851 |
| 1988 | 0.0852625 |
| 1987 | 0.0882473 |
| 1986 | 0.0909817 |
| 1985 | 0.0938953 |
| 1984 | 0.0996458 |
| 1983 | 0.102611 |
| 1982 | 0.105694 |
| 1981 | 0.108879 |
| 1980 | 0.112143 |
| 1979 | 0.115181 |
| 1978 | 0.11832 |
| 1977 | 0.121008 |
| 1976 | 0.122499 |
| 1975 | 0.121355 |
| 1974 | 0.124187 |
| 1973 | 0.126528 |
| 1972 | 0.128684 |
| 1971 | 0.131185 |
| 1970 | 0.134275 |
| 1969 | 0.136533 |
| 1968 | 0.139244 |
| 1967 | 0.141793 |
| 1966 | 0.144576 |
| 1965 | 0.148134 |
| 1964 | 0.152017 |
| 1963 | 0.15622 |
| 1962 | 0.160712 |
| 1961 | 0.165071 |
| 1960 | - |