| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 26414.51 |
| 8 | 2016 | 27323.51 |
| 9 | 2015 | 28938.26 |
| 10 | 2014 | 29569.38 |
| 11 | 2013 | 29191.90 |
| 12 | 2012 | 28787.40 |
| 13 | 2011 | 27528.10 |
| 14 | 2010 | 27570.43 |
| 15 | 2009 | 27328.05 |
| 16 | 2008 | 28018.70 |
| 17 | 2007 | 26121.96 |
| 18 | 2006 | 23800.84 |
| 19 | 2005 | 22200.88 |
| 20 | 2004 | 20029.30 |
| 21 | 2003 | 18764.32 |
| 22 | 2002 | 18885.97 |
| 23 | 2001 | 17274.66 |
| 24 | 2000 | 17166.30 |
| 25 | 1999 | 17212.41 |
| 26 | 1998 | 17364.13 |
| 27 | 1997 | 17114.69 |
| 28 | 1996 | 16546.07 |
| 29 | 1995 | 15256.73 |
| 30 | 1994 | 13799.44 |
| 31 | 1993 | 14036.13 |
| 32 | 1992 | 18889.72 |
| 33 | 1991 | 20641.32 |
