| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 20.6 |
| 2020 | 20.9 |
| 2019 | 21.1 |
| 2018 | 21.3 |
| 2017 | 21.5 |
| 2016 | 21.7 |
| 2015 | 21.9 |
| 2014 | 22.1 |
| 2013 | 22.3 |
| 2012 | 22.6 |
| 2011 | 22.8 |
| 2010 | 23 |
| 2009 | 23.3 |
| 2008 | 23.7 |
| 2007 | 24.1 |
| 2006 | 24.5 |
| 2005 | 25.1 |
| 2004 | 25.8 |
| 2003 | 26.7 |
| 2002 | 27.6 |
| 2001 | 28.7 |
| 2000 | 30 |
| 1999 | 31.5 |
| 1998 | 33.1 |
| 1997 | 35 |
| 1996 | 37 |
| 1995 | 39.2 |
| 1994 | 41.6 |
| 1993 | 44 |
| 1992 | 46.6 |
| 1991 | 49.1 |
| 1990 | 51.7 |
| 1989 | 54.1 |
| 1988 | 56.4 |
| 1987 | 58.5 |
| 1986 | 60.3 |
| 1985 | 62 |
| 1984 | 63.4 |
| 1983 | 64.9 |
| 1982 | 66.3 |
| 1981 | 67.8 |
| 1980 | 69.4 |
| 1979 | 71 |
| 1978 | 72.7 |
| 1977 | 74.3 |
| 1976 | 75.9 |
| 1975 | 77.4 |
| 1974 | 78.7 |
| 1973 | 79.9 |
| 1972 | 81 |
| 1971 | 82 |
| 1970 | 82.8 |
| 1969 | 83.6 |
| 1968 | 84.3 |
| 1967 | 85 |
| 1966 | 85.7 |
| 1965 | 86.3 |
| 1964 | 87.2 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |