| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 9.11696 |
| 2021 | 8.75313 |
| 2020 | 8.42741 |
| 2019 | 8.07365 |
| 2018 | 7.75751 |
| 2017 | 7.47152 |
| 2016 | 7.23221 |
| 2015 | 7.02375 |
| 2014 | 6.78986 |
| 2013 | 6.62882 |
| 2012 | 6.55861 |
| 2011 | 6.51501 |
| 2010 | 6.48555 |
| 2009 | 6.46751 |
| 2008 | 6.4534 |
| 2007 | 6.43913 |
| 2006 | 6.42342 |
| 2005 | 6.40467 |
| 2004 | 6.38203 |
| 2003 | 6.35412 |
| 2002 | 6.31799 |
| 2001 | 6.2676 |
| 2000 | 6.20005 |
| 1999 | 6.11982 |
| 1998 | 6.02884 |
| 1997 | 5.93139 |
| 1996 | 5.84088 |
| 1995 | 5.76756 |
| 1994 | 5.71306 |
| 1993 | 5.67699 |
| 1992 | 5.65819 |
| 1991 | 5.64347 |
| 1990 | 5.62429 |
| 1989 | 5.60244 |
| 1988 | 5.57673 |
| 1987 | 5.54814 |
| 1986 | 5.5231 |
| 1985 | 5.51142 |
| 1984 | 5.51212 |
| 1983 | 5.52114 |
| 1982 | 5.53317 |
| 1981 | 5.54159 |
| 1980 | 5.54101 |
| 1979 | 5.51271 |
| 1978 | 5.47129 |
| 1977 | 5.43812 |
| 1976 | 5.40597 |
| 1975 | 5.38399 |
| 1974 | 5.39226 |
| 1973 | 5.42733 |
| 1972 | 5.47731 |
| 1971 | 5.51732 |
| 1970 | 5.52149 |
| 1969 | 5.49869 |
| 1968 | 5.45797 |
| 1967 | 5.38887 |
| 1966 | 5.30245 |
| 1965 | 5.22865 |
| 1964 | 5.16531 |
| 1963 | 5.11468 |
| 1962 | 5.07148 |
| 1961 | 5.00776 |
| 1960 | 4.93604 |