| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | |
| 8 | 2017 | |
| 9 | 2016 | |
| 10 | 2015 | |
| 11 | 2014 | 3.82 |
| 12 | 2013 | 3.94 |
| 13 | 2012 | 4.11 |
| 14 | 2011 | 3.64 |
| 15 | 2010 | 3.23 |
| 16 | 2009 | 2.72 |
| 17 | 2008 | 2.86 |
| 18 | 2007 | 2.51 |
| 19 | 2006 | 2.47 |
| 20 | 2005 | 2.25 |
| 21 | 2004 | 1.99 |
| 22 | 2003 | 1.72 |
| 23 | 2002 | 1.57 |
| 24 | 2001 | 1.59 |
| 25 | 2000 | 1.79 |
| 26 | 1999 | 1.76 |
| 27 | 1998 | 1.67 |
| 28 | 1997 | 1.86 |
| 29 | 1996 | 1.93 |
| 30 | 1995 | 1.81 |
| 31 | 1994 | 1.70 |
| 32 | 1993 | 1.16 |
| 33 | 1992 | 1.18 |
| 34 | 1991 | 1.10 |
| 35 | 1990 | 0.95 |
| 36 | 1989 | 0.90 |
| 37 | 1988 | 0.89 |
| 38 | 1987 | 0.69 |
| 39 | 1986 | 0.58 |
| 40 | 1985 | 0.51 |
| 41 | 1984 | 0.55 |
| 42 | 1983 | 0.52 |
| 43 | 1982 | 0.53 |
| 44 | 1981 | 0.54 |
| 45 | 1980 | 0.46 |
| 46 | 1979 | 0.39 |
| 47 | 1978 | 0.36 |
| 48 | 1977 | 0.30 |
| 49 | 1976 | 0.26 |
| 50 | 1975 | 0.28 |
