| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 24.1 |
| 2020 | 24.4 |
| 2019 | 24.6 |
| 2018 | 24.9 |
| 2017 | 25.1 |
| 2016 | 25.4 |
| 2015 | 25.7 |
| 2014 | 25.9 |
| 2013 | 26.2 |
| 2012 | 26.5 |
| 2011 | 26.7 |
| 2010 | 27 |
| 2009 | 27.4 |
| 2008 | 27.8 |
| 2007 | 28.2 |
| 2006 | 28.8 |
| 2005 | 29.5 |
| 2004 | 30.3 |
| 2003 | 31.3 |
| 2002 | 32.4 |
| 2001 | 33.6 |
| 2000 | 35.1 |
| 1999 | 36.8 |
| 1998 | 38.6 |
| 1997 | 40.8 |
| 1996 | 43.1 |
| 1995 | 45.6 |
| 1994 | 48.3 |
| 1993 | 51.1 |
| 1992 | 53.9 |
| 1991 | 56.8 |
| 1990 | 59.6 |
| 1989 | 62.2 |
| 1988 | 64.8 |
| 1987 | 67.1 |
| 1986 | 69.1 |
| 1985 | 70.9 |
| 1984 | 72.5 |
| 1983 | 74 |
| 1982 | 75.6 |
| 1981 | 77.3 |
| 1980 | 79 |
| 1979 | 80.8 |
| 1978 | 82.7 |
| 1977 | 84.4 |
| 1976 | 86.1 |
| 1975 | 87.8 |
| 1974 | 89.3 |
| 1973 | 90.7 |
| 1972 | 92 |
| 1971 | 93.2 |
| 1970 | 94.2 |
| 1969 | 95.2 |
| 1968 | 96 |
| 1967 | 96.9 |
| 1966 | 97.8 |
| 1965 | 98.6 |
| 1964 | 99.4 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |