| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 5.66887 |
| 2021 | 5.49139 |
| 2020 | 5.37952 |
| 2019 | 5.3397 |
| 2018 | 5.35679 |
| 2017 | 5.41581 |
| 2016 | 5.42507 |
| 2015 | 5.42223 |
| 2014 | 5.4635 |
| 2013 | 5.47737 |
| 2012 | 5.4762 |
| 2011 | 5.49827 |
| 2010 | 5.45205 |
| 2009 | 5.32328 |
| 2008 | 5.14864 |
| 2007 | 4.92887 |
| 2006 | 4.69709 |
| 2005 | 4.48319 |
| 2004 | 4.28779 |
| 2003 | 4.03482 |
| 2002 | 3.70904 |
| 2001 | 3.41055 |
| 2000 | 3.13775 |
| 1999 | 2.83239 |
| 1998 | 2.6284 |
| 1997 | 2.54492 |
| 1996 | 2.50116 |
| 1995 | 2.48125 |
| 1994 | 2.48541 |
| 1993 | 2.51098 |
| 1992 | 2.55725 |
| 1991 | 2.62515 |
| 1990 | 2.71229 |
| 1989 | 2.81568 |
| 1988 | 2.93523 |
| 1987 | 3.0573 |
| 1986 | 3.15627 |
| 1985 | 3.21749 |
| 1984 | 3.24247 |
| 1983 | 3.22718 |
| 1982 | 3.1829 |
| 1981 | 3.14828 |
| 1980 | 3.14513 |
| 1979 | 3.15105 |
| 1978 | 3.18341 |
| 1977 | 3.25618 |
| 1976 | 3.32278 |
| 1975 | 3.36775 |
| 1974 | 3.3993 |
| 1973 | 3.41828 |
| 1972 | 3.42672 |
| 1971 | 3.44359 |
| 1970 | 3.48297 |
| 1969 | 3.5457 |
| 1968 | 3.63558 |
| 1967 | 3.7428 |
| 1966 | 3.83756 |
| 1965 | 3.90377 |
| 1964 | 3.94316 |
| 1963 | 3.95308 |
| 1962 | 3.94064 |
| 1961 | 3.9381 |
| 1960 | 3.98371 |