| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 5130.00 |
| 8 | 2014 | 5220.00 |
| 9 | 2013 | 5030.00 |
| 10 | 2012 | 4770.00 |
| 11 | 2011 | 4840.00 |
| 12 | 2010 | 4740.00 |
| 13 | 2009 | 4650.00 |
| 14 | 2008 | 4370.00 |
| 15 | 2007 | 3620.00 |
| 16 | 2006 | 3350.00 |
| 17 | 2005 | 3020.00 |
| 18 | 2004 | 2590.00 |
| 19 | 2003 | 2110.00 |
| 20 | 2002 | 1850.00 |
| 21 | 2001 | 1820.00 |
| 22 | 2000 | 1920.00 |
| 23 | 1999 | 1910.00 |
| 24 | 1998 | 2010.00 |
| 25 | 1997 | 2220.00 |
| 26 | 1996 | 2180.00 |
| 27 | 1995 | 1790.00 |
| 28 | 1994 | 1400.00 |
| 29 | 1993 | 1450.00 |
| 30 | 1992 | 1720.00 |
