| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 17 |
| 2020 | 17.1 |
| 2019 | 17.3 |
| 2018 | 17.5 |
| 2017 | 17.6 |
| 2016 | 17.8 |
| 2015 | 17.9 |
| 2014 | 18.1 |
| 2013 | 18.3 |
| 2012 | 18.4 |
| 2011 | 18.6 |
| 2010 | 18.8 |
| 2009 | 19.1 |
| 2008 | 19.3 |
| 2007 | 19.7 |
| 2006 | 20.1 |
| 2005 | 20.5 |
| 2004 | 21.1 |
| 2003 | 21.8 |
| 2002 | 22.6 |
| 2001 | 23.5 |
| 2000 | 24.6 |
| 1999 | 25.9 |
| 1998 | 27.3 |
| 1997 | 28.8 |
| 1996 | 30.5 |
| 1995 | 32.4 |
| 1994 | 34.4 |
| 1993 | 36.6 |
| 1992 | 38.8 |
| 1991 | 41.1 |
| 1990 | 43.3 |
| 1989 | 45.5 |
| 1988 | 47.6 |
| 1987 | 49.5 |
| 1986 | 51.2 |
| 1985 | 52.6 |
| 1984 | 54 |
| 1983 | 55.3 |
| 1982 | 56.5 |
| 1981 | 57.8 |
| 1980 | 59.2 |
| 1979 | 60.7 |
| 1978 | 62.2 |
| 1977 | 63.7 |
| 1976 | 65.1 |
| 1975 | 66.4 |
| 1974 | 67.5 |
| 1973 | 68.5 |
| 1972 | 69.4 |
| 1971 | 70.2 |
| 1970 | 70.8 |
| 1969 | 71.4 |
| 1968 | 72 |
| 1967 | 72.5 |
| 1966 | 73 |
| 1965 | 73.6 |
| 1964 | 74.3 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |