| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 52083.05 |
| 8 | 2016 | 52908.50 |
| 9 | 2015 | 49967.30 |
| 10 | 2014 | 52654.34 |
| 11 | 2013 | 50407.35 |
| 12 | 2012 | 52751.51 |
| 13 | 2011 | 56355.49 |
| 14 | 2010 | 54227.25 |
| 15 | 2009 | 50285.61 |
| 16 | 2008 | 51065.21 |
| 17 | 2007 | 49573.25 |
| 18 | 2006 | 46540.07 |
| 19 | 2005 | 44987.62 |
| 20 | 2004 | 44577.85 |
| 21 | 2003 | 45147.61 |
| 22 | 2002 | 43644.56 |
| 23 | 2001 | 41668.55 |
| 24 | 2000 | 42372.83 |
| 25 | 1999 | 41773.38 |
| 26 | 1998 | 42612.58 |
| 27 | 1997 | 43489.73 |
| 28 | 1996 | 44584.89 |
| 29 | 1995 | 43152.83 |
| 30 | 1994 | 43140.09 |
| 31 | 1993 | 43824.85 |
| 32 | 1992 | 44302.29 |
| 33 | 1991 | 43831.42 |
