| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 5171.90 |
| 8 | 2016 | 5099.48 |
| 9 | 2015 | 4894.30 |
| 10 | 2014 | 6257.64 |
| 11 | 2013 | 6059.88 |
| 12 | 2012 | 5081.65 |
| 13 | 2011 | 4478.09 |
| 14 | 2010 | 4283.14 |
| 15 | 2009 | 4073.77 |
| 16 | 2008 | 4001.97 |
| 17 | 2007 | 3840.79 |
| 18 | 2006 | 3587.43 |
| 19 | 2005 | 3466.32 |
| 20 | 2004 | 3357.18 |
| 21 | 2003 | 3352.21 |
| 22 | 2002 | 3186.97 |
| 23 | 2001 | 2673.84 |
| 24 | 2000 | 3019.61 |
| 25 | 1999 | 2900.95 |
| 26 | 1998 | 2967.62 |
| 27 | 1997 | 2943.55 |
| 28 | 1996 | 3161.96 |
| 29 | 1995 | 3121.09 |
| 30 | 1994 | 3399.75 |
| 31 | 1993 | 3475.64 |
| 32 | 1992 | 3419.42 |
| 33 | 1991 | 4134.65 |
