| 年份 | 越南  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.41255 | 
| 2021 | 4.42127 | 
| 2020 | 4.3714 | 
| 2019 | 4.25561 | 
| 2018 | 4.11364 | 
| 2017 | 3.94268 | 
| 2016 | 3.76615 | 
| 2015 | 3.60619 | 
| 2014 | 3.45921 | 
| 2013 | 3.2677 | 
| 2012 | 3.01946 | 
| 2011 | 2.79249 | 
| 2010 | 2.58451 | 
| 2009 | 2.33849 | 
| 2008 | 2.16193 | 
| 2007 | 2.07962 | 
| 2006 | 2.02713 | 
| 2005 | 1.99133 | 
| 2004 | 1.97174 | 
| 2003 | 1.96572 | 
| 2002 | 1.97273 | 
| 2001 | 1.99316 | 
| 2000 | 2.02544 | 
| 1999 | 2.07297 | 
| 1998 | 2.13768 | 
| 1997 | 2.20542 | 
| 1996 | 2.25685 | 
| 1995 | 2.28259 | 
| 1994 | 2.28464 | 
| 1993 | 2.26053 | 
| 1992 | 2.21851 | 
| 1991 | 2.18499 | 
| 1990 | 2.17421 | 
| 1989 | 2.18169 | 
| 1988 | 2.20585 | 
| 1987 | 2.24433 | 
| 1986 | 2.27946 | 
| 1985 | 2.29957 | 
| 1984 | 2.30758 | 
| 1983 | 2.30365 | 
| 1982 | 2.28984 | 
| 1981 | 2.28104 | 
| 1980 | 2.2888 | 
| 1979 | 2.30611 | 
| 1978 | 2.34275 | 
| 1977 | 2.40218 | 
| 1976 | 2.45491 | 
| 1975 | 2.48794 | 
| 1974 | 2.50659 | 
| 1973 | 2.50849 | 
| 1972 | 2.49761 | 
| 1971 | 2.49906 | 
| 1970 | 2.52643 | 
| 1969 | 2.57858 | 
| 1968 | 2.66215 | 
| 1967 | 2.76401 | 
| 1966 | 2.84638 | 
| 1965 | 2.89265 | 
| 1964 | 2.90626 | 
| 1963 | 2.88425 | 
| 1962 | 2.82854 | 
| 1961 | 2.76283 | 
| 1960 | 2.71881 |