| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 18110.69 |
| 8 | 2016 | 18587.76 |
| 9 | 2015 | 18576.25 |
| 10 | 2014 | 18997.59 |
| 11 | 2013 | 18738.96 |
| 12 | 2012 | 18767.43 |
| 13 | 2011 | 22892.57 |
| 14 | 2010 | 23370.57 |
| 15 | 2009 | 22445.60 |
| 16 | 2008 | 24263.87 |
| 17 | 2007 | 24081.05 |
| 18 | 2006 | 23537.24 |
| 19 | 2005 | 22818.29 |
| 20 | 2004 | 22242.79 |
| 21 | 2003 | 21699.80 |
| 22 | 2002 | 20916.10 |
| 23 | 2001 | 20248.16 |
| 24 | 2000 | 19557.64 |
| 25 | 1999 | 18864.49 |
| 26 | 1998 | 18784.12 |
| 27 | 1997 | 18475.08 |
| 28 | 1996 | 16145.20 |
| 29 | 1995 | 15797.00 |
| 30 | 1994 | 15435.32 |
| 31 | 1993 | 15728.96 |
| 32 | 1992 | 15422.08 |
| 33 | 1991 | 14729.52 |
