| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 1.64051 |
| 2021 | 1.59686 |
| 2020 | 1.5671 |
| 2019 | 1.54727 |
| 2018 | 1.54087 |
| 2017 | 1.5452 |
| 2016 | 1.56019 |
| 2015 | 1.58492 |
| 2014 | 1.6182 |
| 2013 | 1.6607 |
| 2012 | 1.70495 |
| 2011 | 1.73546 |
| 2010 | 1.74392 |
| 2009 | 1.73035 |
| 2008 | 1.69116 |
| 2007 | 1.63348 |
| 2006 | 1.57899 |
| 2005 | 1.53945 |
| 2004 | 1.5124 |
| 2003 | 1.49743 |
| 2002 | 1.4921 |
| 2001 | 1.48192 |
| 2000 | 1.45871 |
| 1999 | 1.42658 |
| 1998 | 1.38685 |
| 1997 | 1.34139 |
| 1996 | 1.30088 |
| 1995 | 1.27326 |
| 1994 | 1.25929 |
| 1993 | 1.2601 |
| 1992 | 1.27306 |
| 1991 | 1.28497 |
| 1990 | 1.28707 |
| 1989 | 1.27962 |
| 1988 | 1.26052 |
| 1987 | 1.2327 |
| 1986 | 1.20972 |
| 1985 | 1.20167 |
| 1984 | 1.20744 |
| 1983 | 1.22628 |
| 1982 | 1.25384 |
| 1981 | 1.27559 |
| 1980 | 1.28153 |
| 1979 | 1.26918 |
| 1978 | 1.23977 |
| 1977 | 1.19855 |
| 1976 | 1.15685 |
| 1975 | 1.12435 |
| 1974 | 1.1057 |
| 1973 | 1.09906 |
| 1972 | 1.10244 |
| 1971 | 1.10629 |
| 1970 | 1.10195 |
| 1969 | 1.09441 |
| 1968 | 1.08748 |
| 1967 | 1.07613 |
| 1966 | 1.05947 |
| 1965 | 1.04295 |
| 1964 | 1.02551 |
| 1963 | 1.00742 |
| 1962 | 0.988222 |
| 1961 | 0.965053 |
| 1960 | 0.942716 |