| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 37762.43 |
| 8 | 2016 | 37071.80 |
| 9 | 2015 | 35451.14 |
| 10 | 2014 | 34953.48 |
| 11 | 2013 | 33020.32 |
| 12 | 2012 | 29655.58 |
| 13 | 2011 | 26833.48 |
| 14 | 2010 | 24151.81 |
| 15 | 2009 | 23180.91 |
| 16 | 2008 | 23755.12 |
| 17 | 2007 | 21941.07 |
| 18 | 2006 | 20244.33 |
| 19 | 2005 | 18988.28 |
| 20 | 2004 | 18069.93 |
| 21 | 2003 | 16707.99 |
| 22 | 2002 | 15847.57 |
| 23 | 2001 | 15463.73 |
| 24 | 2000 | 15366.92 |
| 25 | 1999 | 15538.50 |
| 26 | 1998 | 15377.42 |
| 27 | 1997 | 15152.23 |
| 28 | 1996 | 14849.15 |
| 29 | 1995 | 14820.38 |
| 30 | 1994 | 14221.13 |
| 31 | 1993 | 14251.69 |
| 32 | 1992 | 15105.70 |
| 33 | 1991 | 17139.78 |
