| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 54688.30 |
| 8 | 2013 | 52290.90 |
| 9 | 2012 | 52759.40 |
| 10 | 2011 | 56456.30 |
| 11 | 2010 | 62015.70 |
| 12 | 2009 | 65973.60 |
| 13 | 2008 | 73952.60 |
| 14 | 2007 | 73713.80 |
| 15 | 2006 | 67933.90 |
| 16 | 2005 | 64439.60 |
| 17 | 2004 | 61871.20 |
| 18 | 2003 | 58623.50 |
| 19 | 2002 | 56596.00 |
| 20 | 2001 | 56843.40 |
| 21 | 2000 | 53658.80 |
| 22 | 1999 | 52165.80 |
| 23 | 1998 | 47910.60 |
| 24 | 1997 | 44776.70 |
