| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 25824.26 |
| 8 | 2016 | 26995.03 |
| 9 | 2015 | 25783.29 |
| 10 | 2014 | 24040.87 |
| 11 | 2013 | 22451.57 |
| 12 | 2012 | 22666.41 |
| 13 | 2011 | 23649.71 |
| 14 | 2010 | 23103.94 |
| 15 | 2009 | 24602.91 |
| 16 | 2008 | 31459.54 |
| 17 | 2007 | 29446.08 |
| 18 | 2006 | 28728.57 |
| 19 | 2005 | 24115.27 |
| 20 | 2004 | 21233.93 |
| 21 | 2003 | 18848.78 |
| 22 | 2002 | 17803.08 |
| 23 | 2001 | 18323.87 |
