| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 15.008 |
| 2020 | 15.4 |
| 2019 | 15.663 |
| 2018 | 15.873 |
| 2017 | 16.1 |
| 2016 | 16.438 |
| 2015 | 16.787 |
| 2014 | 16.981 |
| 2013 | 17.152 |
| 2012 | 17.078 |
| 2011 | 16.929 |
| 2010 | 16.906 |
| 2009 | 17.016 |
| 2008 | 17.143 |
| 2007 | 17.072 |
| 2006 | 16.995 |
| 2005 | 17.465 |
| 2004 | 17.862 |
| 2003 | 17.879 |
| 2002 | 18.142 |
| 2001 | 17.969 |
| 2000 | 18.046 |
| 1999 | 18.08 |
| 1998 | 18.525 |
| 1997 | 19.372 |
| 1996 | 20.457 |
| 1995 | 22.065 |
| 1994 | 23.913 |
| 1993 | 25.508 |
| 1992 | 26.773 |
| 1991 | 27.79 |
| 1990 | 28.508 |
| 1989 | 29.146 |
| 1988 | 29.811 |
| 1987 | 30.543 |
| 1986 | 31.378 |
| 1985 | 32.006 |
| 1984 | 32.607 |
| 1983 | 33.107 |
| 1982 | 33.417 |
| 1981 | 33.573 |
| 1980 | 33.454 |
| 1979 | 33.559 |
| 1978 | 33.634 |
| 1977 | 33.649 |
| 1976 | 33.99 |
| 1975 | 34.411 |
| 1974 | 34.95 |
| 1973 | 36.168 |
| 1972 | 35.755 |
| 1971 | 35.202 |
| 1970 | 34.787 |
| 1969 | 34.775 |
| 1968 | 34.978 |
| 1967 | 34.398 |
| 1966 | 35.297 |
| 1965 | 36.917 |
| 1964 | 38.366 |
| 1963 | 39.719 |
| 1962 | 39.8 |
| 1961 | 35.609 |
| 1960 | 41.331 |