| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 24341.76 |
| 8 | 2016 | 23937.42 |
| 9 | 2015 | 23731.53 |
| 10 | 2014 | 23220.10 |
| 11 | 2013 | 22599.70 |
| 12 | 2012 | 22588.22 |
| 13 | 2011 | 22609.89 |
| 14 | 2010 | 22119.72 |
| 15 | 2009 | 22339.07 |
| 16 | 2008 | 22589.54 |
| 17 | 2007 | 22357.09 |
| 18 | 2006 | 22382.90 |
| 19 | 2005 | 21889.12 |
| 20 | 2004 | 21532.76 |
| 21 | 2003 | 21038.83 |
| 22 | 2002 | 21263.54 |
| 23 | 2001 | 21133.13 |
| 24 | 2000 | 20999.83 |
| 25 | 1999 | 20923.33 |
| 26 | 1998 | 20582.15 |
| 27 | 1997 | 21320.88 |
| 28 | 1996 | 20892.54 |
| 29 | 1995 | 20605.39 |
| 30 | 1994 | 19775.67 |
| 31 | 1993 | 20072.11 |
| 32 | 1992 | 19210.74 |
| 33 | 1991 | 18307.87 |
