| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 18802.43 |
| 8 | 2016 | 18132.29 |
| 9 | 2015 | 17345.78 |
| 10 | 2014 | 16376.26 |
| 11 | 2013 | 15502.15 |
| 12 | 2012 | 14660.11 |
| 13 | 2011 | 13918.26 |
| 14 | 2010 | 13393.53 |
| 15 | 2009 | 12808.19 |
| 16 | 2008 | 12059.64 |
| 17 | 2007 | 11268.18 |
| 18 | 2006 | 10577.19 |
| 19 | 2005 | 10129.62 |
| 20 | 2004 | 9753.61 |
| 21 | 2003 | 9348.39 |
| 22 | 2002 | 9278.46 |
| 23 | 2001 | 9244.98 |
| 24 | 2000 | 9194.55 |
| 25 | 1999 | 9179.06 |
| 26 | 1998 | 8968.15 |
| 27 | 1997 | 8560.50 |
| 28 | 1996 | 8302.66 |
| 29 | 1995 | 8109.77 |
| 30 | 1994 | 8354.27 |
| 31 | 1993 | 8872.91 |
| 32 | 1992 | 9169.91 |
| 33 | 1991 | 10686.92 |
