| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | |
| 8 | 2016 | |
| 9 | 2015 | |
| 10 | 2014 | |
| 11 | 2013 | 25.15 |
| 12 | 2012 | 21.89 |
| 13 | 2011 | 17.38 |
| 14 | 2010 | 13.29 |
| 15 | 2009 | 9.10 |
| 16 | 2008 | 9.36 |
| 17 | 2007 | 5.52 |
| 18 | 2006 | 4.29 |
| 19 | 2005 | 2.92 |
| 20 | 2004 | 2.14 |
| 21 | 2003 | 2.95 |
| 22 | 2002 | 2.84 |
| 23 | 2001 | 2.07 |
| 24 | 2000 | 2.21 |
| 25 | 1999 | 2.38 |
| 26 | 1998 | 2.98 |
| 27 | 1997 | 3.13 |
| 28 | 1996 | 3.38 |
| 29 | 1995 | 0.34 |
| 30 | 1994 | 3.14 |
| 31 | 1993 | 1.88 |
| 32 | 1992 | 0.50 |
| 33 | 1990 | 0.11 |
| 34 | 1988 | 0.08 |
| 35 | 1986 | 0.06 |
| 36 | 1985 | 0.02 |
