| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 24076.46 |
| 8 | 2016 | 22098.85 |
| 9 | 2015 | 20724.84 |
| 10 | 2014 | 20752.72 |
| 11 | 2013 | 21022.99 |
| 12 | 2012 | 19486.06 |
| 13 | 2011 | 19849.32 |
| 14 | 2010 | 19138.24 |
| 15 | 2009 | 18674.99 |
| 16 | 2008 | 20052.84 |
| 17 | 2007 | 18985.76 |
| 18 | 2006 | 19005.55 |
| 19 | 2005 | 19548.46 |
| 20 | 2004 | 18297.80 |
| 21 | 2003 | 16471.20 |
| 22 | 2002 | 15607.08 |
| 23 | 2001 | 14455.14 |
| 24 | 2000 | 13415.88 |
| 25 | 1999 | 13605.43 |
| 26 | 1998 | 14039.97 |
| 27 | 1997 | 14844.50 |
| 28 | 1996 | 14652.28 |
| 29 | 1995 | 15250.63 |
| 30 | 1994 | 15567.01 |
| 31 | 1993 | 22120.68 |
| 32 | 1992 | 22507.76 |
| 33 | 1991 | 31385.24 |
