| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 23958.74 |
| 8 | 2016 | 25814.86 |
| 9 | 2015 | 28729.46 |
| 10 | 2014 | 28988.57 |
| 11 | 2013 | 27769.23 |
| 12 | 2012 | 28332.35 |
| 13 | 2011 | 26350.21 |
| 14 | 2010 | 26508.64 |
| 15 | 2009 | 25373.85 |
| 16 | 2008 | 23750.94 |
| 17 | 2007 | 23070.45 |
| 18 | 2006 | 25577.65 |
| 19 | 2005 | 24791.82 |
| 20 | 2004 | 24012.17 |
| 21 | 2003 | 24127.35 |
| 22 | 2002 | 24579.89 |
| 23 | 2001 | 24155.69 |
| 24 | 2000 | 24392.94 |
| 25 | 1999 | 23904.95 |
| 26 | 1998 | 25182.50 |
| 27 | 1997 | 24751.84 |
| 28 | 1996 | 25418.53 |
| 29 | 1995 | 25122.10 |
| 30 | 1994 | 24852.49 |
| 31 | 1993 | 26984.06 |
| 32 | 1992 | 28064.51 |
| 33 | 1991 | 28147.87 |
