| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 18577.17 |
| 8 | 2016 | 18827.90 |
| 9 | 2015 | 19521.60 |
| 10 | 2014 | 19427.88 |
| 11 | 2013 | 18684.75 |
| 12 | 2012 | 17910.13 |
| 13 | 2011 | 17563.06 |
| 14 | 2010 | 17131.77 |
| 15 | 2009 | 16288.61 |
| 16 | 2008 | 15476.20 |
| 17 | 2007 | 14871.18 |
| 18 | 2006 | 14303.01 |
| 19 | 2005 | 13830.82 |
| 20 | 2004 | 13298.48 |
| 21 | 2003 | 12491.35 |
| 22 | 2002 | 11940.33 |
| 23 | 2001 | 10659.37 |
| 24 | 2000 | 10341.43 |
| 25 | 1999 | 10109.65 |
| 26 | 1998 | 10309.35 |
| 27 | 1997 | 10329.15 |
| 28 | 1996 | 10321.90 |
| 29 | 1995 | 10198.04 |
| 30 | 1994 | 10472.19 |
| 31 | 1993 | 10959.33 |
| 32 | 1992 | 11462.80 |
| 33 | 1991 | 11265.07 |
