| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 25208.11 |
| 8 | 2016 | 24580.47 |
| 9 | 2015 | 23677.02 |
| 10 | 2014 | 22768.08 |
| 11 | 2013 | 22016.08 |
| 12 | 2012 | 20991.72 |
| 13 | 2011 | 20400.21 |
| 14 | 2010 | 19703.19 |
| 15 | 2009 | 19087.93 |
| 16 | 2008 | 18655.98 |
| 17 | 2007 | 18079.26 |
| 18 | 2006 | 17724.11 |
| 19 | 2005 | 17102.23 |
| 20 | 2004 | 16023.08 |
| 21 | 2003 | 15416.29 |
| 22 | 2002 | 14903.76 |
| 23 | 2001 | 14203.15 |
| 24 | 2000 | 13843.59 |
| 25 | 1999 | 13620.70 |
| 26 | 1998 | 13742.28 |
| 27 | 1997 | 16194.71 |
| 28 | 1996 | 15738.17 |
| 29 | 1995 | 14918.83 |
| 30 | 1994 | 14097.83 |
| 31 | 1993 | 13454.87 |
| 32 | 1992 | 12814.21 |
| 33 | 1991 | 12396.79 |
