| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | 2.31068 |
| 2021 | 2.32399 |
| 2020 | 2.32976 |
| 2019 | 2.32145 |
| 2018 | 2.32184 |
| 2017 | 2.31808 |
| 2016 | 2.3051 |
| 2015 | 2.28111 |
| 2014 | 2.24627 |
| 2013 | 2.19833 |
| 2012 | 2.14128 |
| 2011 | 2.08413 |
| 2010 | 2.03357 |
| 2009 | 1.98902 |
| 2008 | 1.94834 |
| 2007 | 1.91037 |
| 2006 | 1.86965 |
| 2005 | 1.8234 |
| 2004 | 1.77312 |
| 2003 | 1.71966 |
| 2002 | 1.66473 |
| 2001 | 1.61278 |
| 2000 | 1.56693 |
| 1999 | 1.52767 |
| 1998 | 1.49625 |
| 1997 | 1.47054 |
| 1996 | 1.44403 |
| 1995 | 1.41303 |
| 1994 | 1.38046 |
| 1993 | 1.34524 |
| 1992 | 1.3086 |
| 1991 | 1.27612 |
| 1990 | 1.25043 |
| 1989 | 1.23091 |
| 1988 | 1.21742 |
| 1987 | 1.20869 |
| 1986 | 1.19555 |
| 1985 | 1.17718 |
| 1984 | 1.1538 |
| 1983 | 1.12159 |
| 1982 | 1.0816 |
| 1981 | 1.04285 |
| 1980 | 1.01055 |
| 1979 | 0.980461 |
| 1978 | 0.954066 |
| 1977 | 0.934189 |
| 1976 | 0.915622 |
| 1975 | 0.89598 |
| 1974 | 0.881027 |
| 1973 | 0.870037 |
| 1972 | 0.860197 |
| 1971 | 0.849652 |
| 1970 | 0.835459 |
| 1969 | 0.819927 |
| 1968 | 0.804747 |
| 1967 | 0.78722 |
| 1966 | 0.766004 |
| 1965 | 0.744678 |
| 1964 | 0.72291 |
| 1963 | 0.701635 |
| 1962 | 0.680072 |
| 1961 | 0.655197 |
| 1960 | 0.630006 |