| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2022 | |
| 2 | 2021 | |
| 3 | 2020 | |
| 4 | 2019 | |
| 5 | 2018 | |
| 6 | 2017 | |
| 7 | 2016 | 19642.89 |
| 8 | 2015 | 18348.93 |
| 9 | 2014 | 18007.23 |
| 10 | 2013 | 17507.80 |
| 11 | 2012 | 17337.50 |
| 12 | 2011 | 17132.35 |
| 13 | 2010 | 16031.36 |
| 14 | 2009 | 15908.34 |
| 15 | 2008 | 16775.77 |
| 16 | 2007 | 16040.32 |
| 17 | 2006 | 16005.24 |
| 18 | 2005 | 16270.67 |
| 19 | 2004 | 16489.15 |
| 20 | 2003 | 17125.13 |
| 21 | 2002 | 16695.13 |
| 22 | 2001 | 15902.88 |
| 23 | 2000 | 15338.66 |
| 24 | 1999 | 15240.44 |
| 25 | 1998 | 14763.90 |
| 26 | 1997 | 14481.51 |
| 27 | 1996 | 14326.61 |
| 28 | 1995 | 14018.18 |
| 29 | 1994 | 13010.99 |
| 30 | 1993 | 12608.41 |
| 31 | 1992 | 12419.89 |
| 32 | 1991 | 12661.44 |
