| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | |
| 8 | 2016 | |
| 9 | 2015 | |
| 10 | 2014 | |
| 11 | 2013 | 32519.69 |
| 12 | 2012 | 30940.96 |
| 13 | 2011 | 30287.55 |
| 14 | 2010 | 28318.69 |
| 15 | 2009 | 27412.31 |
| 16 | 2008 | 26495.86 |
| 17 | 2007 | 25163.78 |
| 18 | 2006 | 24953.53 |
| 19 | 2005 | 24908.49 |
| 20 | 2004 | 24338.86 |
| 21 | 2003 | 24272.05 |
| 22 | 2002 | 24185.48 |
| 23 | 2001 | 23693.42 |
| 24 | 2000 | 23641.18 |
| 25 | 1999 | 23343.25 |
| 26 | 1998 | 24444.37 |
| 27 | 1997 | 25028.02 |
| 28 | 1996 | 24844.48 |
| 29 | 1995 | 24975.36 |
| 30 | 1994 | 25008.11 |
| 31 | 1993 | 24640.47 |
| 32 | 1992 | 24735.08 |
| 33 | 1991 | 24870.15 |
