| 序号 | 时间 (年) |
数据 (万美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 7.66 |
| 8 | 2014 | 4.48 |
| 9 | 2013 | 16.37 |
| 10 | 2012 | 42.64 |
| 11 | 2011 | 40.30 |
| 12 | 2010 | 33.56 |
| 13 | 2009 | 24.35 |
| 14 | 2007 | 20.77 |
| 15 | 2006 | 17.17 |
| 16 | 2005 | 14.52 |
| 17 | 2004 | 11.30 |
| 18 | 2003 | 6.20 |
| 19 | 2002 | 4.60 |
| 20 | 2001 | 4.10 |
| 21 | 2000 | 6.10 |
| 22 | 1995 | 4.80 |
| 23 | 1990 | 1.40 |
