| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 42.60 |
| 8 | 2014 | 39.21 |
| 9 | 2013 | 34.91 |
| 10 | 2012 | 30.53 |
| 11 | 2011 | 27.75 |
| 12 | 2010 | 26.19 |
| 13 | 2009 | 23.16 |
| 14 | 2008 | 17.96 |
| 15 | 2007 | 18.32 |
| 16 | 2006 | 13.09 |
| 17 | 2005 | 13.72 |
| 18 | 2004 | 16.33 |
| 19 | 2003 | 16.03 |
| 20 | 2002 | 12.49 |
| 21 | 2001 | 8.53 |
| 22 | 2000 | 9.14 |
| 23 | 1999 | 7.49 |
| 24 | 1998 | 5.77 |
| 25 | 1997 | 7.11 |
| 26 | 1996 | 9.19 |
| 27 | 1995 | 8.87 |
| 28 | 1994 | 7.71 |
| 29 | 1993 | 7.81 |
| 30 | 1992 | 8.41 |
| 31 | 1991 | 9.15 |
| 32 | 1990 | 7.61 |
| 33 | 1989 | 5.42 |
| 34 | 1988 | 4.63 |
| 35 | 1987 | 3.62 |
| 36 | 1986 | 1.51 |
| 37 | 1985 | 0.42 |
| 38 | 1984 | 0.35 |
| 39 | 1983 | 0.32 |
| 40 | 1982 | 0.55 |
| 41 | 1981 | 0.50 |
| 42 | 1980 | 1.13 |
| 43 | 1979 | 0.48 |
| 44 | 1978 | 0.53 |
| 45 | 1977 | 0.68 |
| 46 | 1976 | 0.90 |
| 47 | 1975 | 1.66 |
| 48 | 1974 | 1.31 |
| 49 | 1973 | 0.67 |
| 50 | 1972 | 0.70 |
| 51 | 1971 | 0.52 |
| 52 | 1970 | 0.46 |
| 53 | 1969 | 0.33 |
| 54 | 1968 | 0.16 |
| 55 | 1967 | 0.13 |
| 56 | 1966 | 0.19 |
| 57 | 1965 | 0.20 |
| 58 | 1964 | 0.19 |
| 59 | 1963 | 0.19 |
| 60 | 1962 | 0.19 |
| 61 | 1961 | 0.18 |
| 62 | 1960 | 0.17 |
