| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 5.46043 |
| 2021 | 5.46503 |
| 2020 | 5.44313 |
| 2019 | 5.4574 |
| 2018 | 5.43995 |
| 2017 | 5.40667 |
| 2016 | 5.39762 |
| 2015 | 5.3276 |
| 2014 | 5.18896 |
| 2013 | 5.02187 |
| 2012 | 4.82618 |
| 2011 | 4.62636 |
| 2010 | 4.44942 |
| 2009 | 4.29327 |
| 2008 | 4.08116 |
| 2007 | 3.80121 |
| 2006 | 3.54869 |
| 2005 | 3.31616 |
| 2004 | 3.03599 |
| 2003 | 2.83539 |
| 2002 | 2.73883 |
| 2001 | 2.67464 |
| 2000 | 2.63292 |
| 1999 | 2.61482 |
| 1998 | 2.61745 |
| 1997 | 2.6388 |
| 1996 | 2.6807 |
| 1995 | 2.74306 |
| 1994 | 2.82498 |
| 1993 | 2.92832 |
| 1992 | 3.03961 |
| 1991 | 3.13066 |
| 1990 | 3.18472 |
| 1989 | 3.2015 |
| 1988 | 3.17562 |
| 1987 | 3.11939 |
| 1986 | 3.07238 |
| 1985 | 3.05661 |
| 1984 | 3.06712 |
| 1983 | 3.10301 |
| 1982 | 3.15856 |
| 1981 | 3.20394 |
| 1980 | 3.22084 |
| 1979 | 3.20489 |
| 1978 | 3.16903 |
| 1977 | 3.13064 |
| 1976 | 3.10387 |
| 1975 | 3.10646 |
| 1974 | 3.13817 |
| 1973 | 3.20125 |
| 1972 | 3.28834 |
| 1971 | 3.36765 |
| 1970 | 3.41549 |
| 1969 | 3.43301 |
| 1968 | 3.42235 |
| 1967 | 3.39089 |
| 1966 | 3.37647 |
| 1965 | 3.4066 |
| 1964 | 3.47828 |
| 1963 | 3.59374 |
| 1962 | 3.73876 |
| 1961 | 3.85567 |
| 1960 | 3.92303 |