| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | |
| 8 | 2013 | |
| 9 | 2012 | |
| 10 | 2011 | |
| 11 | 2010 | 27.02 |
| 12 | 2009 | 21.10 |
| 13 | 2008 | 24.92 |
| 14 | 2007 | 25.46 |
| 15 | 2006 | 26.42 |
| 16 | 2005 | 23.38 |
| 17 | 2004 | 19.80 |
| 18 | 2003 | 14.39 |
| 19 | 2002 | 15.31 |
| 20 | 2001 | 14.21 |
| 21 | 2000 | 13.19 |
| 22 | 1999 | 12.64 |
| 23 | 1998 | 8.24 |
| 24 | 1997 | 5.87 |
| 25 | 1996 | 2.57 |
| 26 | 1995 | 2.70 |
| 27 | 1994 | 1.79 |
| 28 | 1993 | 1.06 |
| 29 | 1992 | 2.05 |
| 30 | 1991 | 1.12 |
| 31 | 1990 | 0.47 |
| 32 | 1989 | 0.28 |
| 33 | 1988 | 0.57 |
| 34 | 1987 | 1.14 |
| 35 | 1986 | 1.18 |
| 36 | 1985 | 1.11 |
| 37 | 1984 | 1.33 |
| 38 | 1983 | 1.20 |
| 39 | 1982 | 1.20 |
| 40 | 1981 | 1.07 |
| 41 | 1980 | 1.59 |
| 42 | 1979 | 2.16 |
| 43 | 1978 | 1.88 |
| 44 | 1977 | 1.82 |
| 45 | 1976 | 1.31 |
| 46 | 1975 | 0.97 |
| 47 | 1974 | 0.45 |
| 48 | 1973 | 0.42 |
| 49 | 1972 | 0.35 |
| 50 | 1971 | 0.22 |
| 51 | 1970 | 0.20 |
| 52 | 1969 | 0.31 |
| 53 | 1968 | 0.32 |
| 54 | 1967 | 0.25 |
| 55 | 1966 | 0.27 |
| 56 | 1965 | 0.23 |
| 57 | 1964 | 0.20 |
| 58 | 1963 | 0.12 |
| 59 | 1962 | 0.13 |
| 60 | 1961 | 0.12 |
| 61 | 1960 | 0.13 |
