| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | 27.18 |
| 8 | 2017 | 25.63 |
| 9 | 2016 | 20.00 |
| 10 | 2015 | 20.99 |
| 11 | 2014 | 28.23 |
| 12 | 2013 | 29.73 |
| 13 | 2012 | 30.71 |
| 14 | 2011 | 28.14 |
| 15 | 2010 | 27.80 |
| 16 | 2009 | 22.74 |
| 17 | 2008 | 30.15 |
| 18 | 2007 | 26.22 |
| 19 | 2006 | 22.04 |
| 20 | 2005 | 18.74 |
| 21 | 2004 | 13.65 |
| 22 | 2003 | 7.41 |
| 23 | 2002 | 4.81 |
| 24 | 2001 | 4.15 |
| 25 | 2000 | 4.04 |
| 26 | 1999 | 2.53 |
| 27 | 1995 | 1.83 |
| 28 | 1990 | 0.92 |
| 29 | 1985 | 0.66 |
| 30 | 1980 | 0.64 |
| 31 | 1978 | 0.46 |
