| 年份 | 越南 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.102201 |
| 2020 | 0.0234989 |
| 2019 | 0.0193784 |
| 2018 | 0.0904699 |
| 2017 | 0.194206 |
| 2016 | 0.121609 |
| 2015 | 0.116505 |
| 2014 | 0.18985 |
| 2013 | 0.315104 |
| 2012 | 0.33255 |
| 2011 | 0.566181 |
| 2010 | 0.452416 |
| 2009 | 0.547749 |
| 2008 | 0.846978 |
| 2007 | 0.44583 |
| 2006 | 0.299105 |
| 2005 | 0.111153 |
| 2004 | 0.0495841 |
| 2003 | 0.0322716 |
| 2002 | 0.0316976 |
| 2001 | 0.0300842 |
| 2000 | 0.0281474 |
| 1999 | 0.0161858 |
| 1998 | 0.0159591 |
| 1997 | 0.0262868 |
| 1996 | 0.00977751 |
| 1995 | 0.0110435 |
| 1994 | 0.0129746 |
| 1993 | 0.00997526 |
| 1992 | 0.05026 |
| 1991 | 0.0355478 |
| 1990 | 0.123925 |
| 1989 | 0.154684 |
| 1988 | 0.0217152 |
| 1987 | 0.00412961 |
| 1986 | 0.0061984 |
| 1985 | 0.0298618 |
| 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 | - |