| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.376819 |
| 2020 | 0.164958 |
| 2019 | 0.21311 |
| 2018 | 0.284156 |
| 2017 | 0.239326 |
| 2016 | 0.198584 |
| 2015 | 0.200613 |
| 2014 | 0.383982 |
| 2013 | 0.518047 |
| 2012 | 0.803271 |
| 2011 | 1.71707 |
| 2010 | 1.35781 |
| 2009 | 0.932561 |
| 2008 | 2.87874 |
| 2007 | 1.55869 |
| 2006 | 0.994198 |
| 2005 | 0.929452 |
| 2004 | 1.4276 |
| 2003 | 0.0647112 |
| 2002 | 0.0744439 |
| 2001 | 0.271702 |
| 2000 | 0.0337048 |
| 1999 | 0.010357 |
| 1998 | 0.029269 |
| 1997 | 0.00919525 |
| 1996 | 0.0190003 |
| 1995 | 0.0986562 |
| 1994 | 0.00614018 |
| 1993 | 0.00765192 |
| 1992 | 0.121481 |
| 1991 | 0.24669 |
| 1990 | 0.409209 |
| 1989 | 0.405439 |
| 1988 | 0.0706231 |
| 1987 | 0.00382283 |
| 1986 | 0.120871 |
| 1985 | 0.438578 |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |