| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 39221.68 |
| 8 | 2016 | 37878.82 |
| 9 | 2015 | 36556.63 |
| 10 | 2014 | 36345.15 |
| 11 | 2013 | 35802.13 |
| 12 | 2012 | 34695.67 |
| 13 | 2011 | 33045.96 |
| 14 | 2010 | 31392.58 |
| 15 | 2009 | 30106.64 |
| 16 | 2008 | 29053.25 |
| 17 | 2007 | 28598.56 |
| 18 | 2006 | 26745.71 |
| 19 | 2005 | 25647.50 |
| 20 | 2004 | 26296.68 |
| 21 | 2003 | 26031.57 |
| 22 | 2002 | 26291.32 |
| 23 | 2001 | 25882.14 |
| 24 | 2000 | 25213.96 |
| 25 | 1999 | 25395.95 |
| 26 | 1998 | 24521.37 |
| 27 | 1997 | 24789.64 |
| 28 | 1996 | 23239.31 |
| 29 | 1995 | 21455.55 |
| 30 | 1994 | 20369.25 |
| 31 | 1993 | 18754.58 |
| 32 | 1992 | 17553.24 |
| 33 | 1991 | 16489.57 |
