| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 35.25 |
| 8 | 2013 | 23.64 |
| 9 | 2012 | 23.02 |
| 10 | 2011 | 28.37 |
| 11 | 2010 | 22.41 |
| 12 | 2009 | 17.81 |
| 13 | 2008 | 8.71 |
| 14 | 2007 | 12.90 |
| 15 | 2006 | 8.67 |
| 16 | 2005 | 10.43 |
| 17 | 2004 | 14.97 |
| 18 | 2003 | 9.56 |
| 19 | 2002 | 9.66 |
| 20 | 2001 | 4.90 |
| 21 | 2000 | 3.63 |
| 22 | 1999 | 5.47 |
| 23 | 1998 | 5.98 |
| 24 | 1997 | 5.88 |
| 25 | 1996 | 8.43 |
| 26 | 1995 | 8.15 |
| 27 | 1994 | 5.88 |
| 28 | 1993 | 5.00 |
| 29 | 1992 | 2.70 |
| 30 | 1991 | 1.06 |
| 31 | 1990 | 0.55 |
| 32 | 1989 | 1.23 |
| 33 | 1988 | 1.50 |
| 34 | 1987 | 2.24 |
| 35 | 1986 | 3.32 |
| 36 | 1985 | 2.16 |
| 37 | 1984 | 1.09 |
| 38 | 1983 | 2.06 |
| 39 | 1982 | 2.77 |
| 40 | 1981 | 3.70 |
| 41 | 1980 | 2.62 |
| 42 | 1979 | 3.19 |
| 43 | 1978 | 2.18 |
| 44 | 1977 | 2.60 |
| 45 | 1976 | 3.32 |
| 46 | 1975 | 3.15 |
| 47 | 1974 | 3.15 |
| 48 | 1973 | 1.95 |
| 49 | 1972 | 0.99 |
| 50 | 1971 | 0.70 |
| 51 | 1970 | 0.72 |
| 52 | 1969 | 0.72 |
| 53 | 1968 | 0.68 |
| 54 | 1967 | 0.65 |
| 55 | 1966 | 0.79 |
| 56 | 1965 | 0.77 |
| 57 | 1964 | 0.61 |
| 58 | 1963 | 0.66 |
| 59 | 1962 | 0.65 |
| 60 | 1961 | 0.57 |
| 61 | 1960 | 0.55 |
