| 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 |