| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 0.734794 |
| 2021 | 0.844182 |
| 2020 | 0.906299 |
| 2019 | 0.904491 |
| 2018 | 0.93284 |
| 2017 | 0.96872 |
| 2016 | 1.00923 |
| 2015 | 1.04227 |
| 2014 | 1.0664 |
| 2013 | 1.07638 |
| 2012 | 1.07201 |
| 2011 | 1.06749 |
| 2010 | 1.06743 |
| 2009 | 1.02939 |
| 2008 | 0.980255 |
| 2007 | 0.960768 |
| 2006 | 0.969169 |
| 2005 | 1.00436 |
| 2004 | 1.02012 |
| 2003 | 1.02829 |
| 2002 | 1.02772 |
| 2001 | 1.02839 |
| 2000 | 1.11687 |
| 1999 | 1.28218 |
| 1998 | 1.39677 |
| 1997 | 1.47303 |
| 1996 | 1.59693 |
| 1995 | 1.7203 |
| 1994 | 1.84402 |
| 1993 | 1.96886 |
| 1992 | 2.07022 |
| 1991 | 2.13831 |
| 1990 | 2.1851 |
| 1989 | 2.20674 |
| 1988 | 2.22121 |
| 1987 | 2.27649 |
| 1986 | 2.32972 |
| 1985 | 2.37614 |
| 1984 | 2.41814 |
| 1983 | 2.44907 |
| 1982 | 2.45982 |
| 1981 | 2.447 |
| 1980 | 2.16971 |
| 1979 | 2.20413 |
| 1978 | 2.56369 |
| 1977 | 2.57148 |
| 1976 | 2.51021 |
| 1975 | 2.30642 |
| 1974 | 2.21932 |
| 1973 | 2.21922 |
| 1972 | 2.27922 |
| 1971 | 2.32851 |
| 1970 | 2.20152 |
| 1969 | 2.14539 |
| 1968 | 2.17243 |
| 1967 | 2.30304 |
| 1966 | 2.43145 |
| 1965 | 2.58726 |
| 1964 | 2.72781 |
| 1963 | 2.83442 |
| 1962 | 2.67611 |
| 1961 | 2.72406 |
| 1960 | - |