| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 0.928953 |
| 2021 | 0.939169 |
| 2020 | 0.948238 |
| 2019 | 0.949798 |
| 2018 | 0.955691 |
| 2017 | 0.960231 |
| 2016 | 0.961175 |
| 2015 | 0.957722 |
| 2014 | 0.949432 |
| 2013 | 0.9342 |
| 2012 | 0.913933 |
| 2011 | 0.894265 |
| 2010 | 0.878866 |
| 2009 | 0.867459 |
| 2008 | 0.859467 |
| 2007 | 0.854213 |
| 2006 | 0.847874 |
| 2005 | 0.838604 |
| 2004 | 0.827559 |
| 2003 | 0.814759 |
| 2002 | 0.8002 |
| 2001 | 0.786016 |
| 2000 | 0.773986 |
| 1999 | 0.764506 |
| 1998 | 0.758289 |
| 1997 | 0.754452 |
| 1996 | 0.750735 |
| 1995 | 0.745739 |
| 1994 | 0.73913 |
| 1993 | 0.729944 |
| 1992 | 0.718502 |
| 1991 | 0.708127 |
| 1990 | 0.700877 |
| 1989 | 0.696346 |
| 1988 | 0.694559 |
| 1987 | 0.694162 |
| 1986 | 0.691218 |
| 1985 | 0.683724 |
| 1984 | 0.671958 |
| 1983 | 0.655034 |
| 1982 | 0.632637 |
| 1981 | 0.609321 |
| 1980 | 0.58911 |
| 1979 | 0.569546 |
| 1978 | 0.55361 |
| 1977 | 0.544141 |
| 1976 | 0.535241 |
| 1975 | 0.526007 |
| 1974 | 0.51988 |
| 1973 | 0.515682 |
| 1972 | 0.511686 |
| 1971 | 0.507539 |
| 1970 | 0.501537 |
| 1969 | 0.494452 |
| 1968 | 0.487256 |
| 1967 | 0.478168 |
| 1966 | 0.466457 |
| 1965 | 0.454532 |
| 1964 | 0.442614 |
| 1963 | 0.431117 |
| 1962 | 0.419263 |
| 1961 | 0.405322 |
| 1960 | 0.391043 |