| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | |
| 8 | 2016 | |
| 9 | 2015 | |
| 10 | 2014 | |
| 11 | 2013 | 28633.36 |
| 12 | 2012 | 26164.96 |
| 13 | 2011 | 27813.27 |
| 14 | 2010 | 27982.17 |
| 15 | 2009 | 27687.67 |
| 16 | 2008 | 28048.60 |
| 17 | 2007 | 27727.82 |
| 18 | 2006 | 26680.35 |
| 19 | 2005 | 25913.83 |
| 20 | 2004 | 25626.60 |
| 21 | 2003 | 25546.10 |
| 22 | 2002 | 25608.80 |
| 23 | 2001 | 25385.57 |
| 24 | 2000 | 25471.05 |
| 25 | 1999 | 25296.93 |
| 26 | 1998 | 25088.42 |
| 27 | 1997 | 24611.78 |
| 28 | 1996 | 24269.37 |
| 29 | 1995 | 24218.87 |
| 30 | 1994 | 23755.09 |
| 31 | 1993 | 23508.98 |
| 32 | 1992 | 23315.91 |
| 33 | 1991 | 22946.55 |
