| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 31.39 |
| 8 | 2014 | 26.65 |
| 9 | 2013 | 27.73 |
| 10 | 2012 | 26.00 |
| 11 | 2011 | 24.71 |
| 12 | 2010 | 25.41 |
| 13 | 2009 | 23.69 |
| 14 | 2008 | 23.64 |
| 15 | 2007 | 21.62 |
| 16 | 2006 | 18.13 |
| 17 | 2005 | 14.40 |
| 18 | 2004 | 13.88 |
| 19 | 2003 | 10.38 |
| 20 | 2002 | 8.66 |
| 21 | 2001 | 7.71 |
| 22 | 2000 | 6.46 |
| 23 | 1999 | 5.23 |
| 24 | 1998 | 4.18 |
| 25 | 1997 | 3.42 |
| 26 | 1996 | 3.23 |
| 27 | 1995 | 2.65 |
| 28 | 1994 | 2.24 |
| 29 | 1993 | 1.67 |
