| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 1.00976 |
| 2021 | 0.9855 |
| 2020 | 0.968349 |
| 2019 | 0.954967 |
| 2018 | 0.949983 |
| 2017 | 0.951135 |
| 2016 | 0.958701 |
| 2015 | 0.97191 |
| 2014 | 0.989717 |
| 2013 | 1.0129 |
| 2012 | 1.03762 |
| 2011 | 1.05501 |
| 2010 | 1.06055 |
| 2009 | 1.05455 |
| 2008 | 1.03436 |
| 2007 | 1.0034 |
| 2006 | 0.974436 |
| 2005 | 0.954879 |
| 2004 | 0.943464 |
| 2003 | 0.939743 |
| 2002 | 0.942591 |
| 2001 | 0.943662 |
| 2000 | 0.937789 |
| 1999 | 0.926857 |
| 1998 | 0.911892 |
| 1997 | 0.893612 |
| 1996 | 0.877702 |
| 1995 | 0.86906 |
| 1994 | 0.86768 |
| 1993 | 0.874235 |
| 1992 | 0.887373 |
| 1991 | 0.899456 |
| 1990 | 0.904987 |
| 1989 | 0.903663 |
| 1988 | 0.893415 |
| 1987 | 0.875711 |
| 1986 | 0.86135 |
| 1985 | 0.856776 |
| 1984 | 0.86104 |
| 1983 | 0.875469 |
| 1982 | 0.896669 |
| 1981 | 0.912721 |
| 1980 | 0.916987 |
| 1979 | 0.90637 |
| 1978 | 0.883805 |
| 1977 | 0.854898 |
| 1976 | 0.82479 |
| 1975 | 0.801851 |
| 1974 | 0.78962 |
| 1973 | 0.786293 |
| 1972 | 0.790734 |
| 1971 | 0.796304 |
| 1970 | 0.796133 |
| 1969 | 0.793311 |
| 1968 | 0.790756 |
| 1967 | 0.784418 |
| 1966 | 0.77368 |
| 1965 | 0.762828 |
| 1964 | 0.751302 |
| 1963 | 0.738929 |
| 1962 | 0.725124 |
| 1961 | 0.708096 |
| 1960 | 0.691681 |