| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 36228.42 |
| 8 | 2016 | 34601.89 |
| 9 | 2015 | 33206.71 |
| 10 | 2014 | 32185.35 |
| 11 | 2013 | 31864.72 |
| 12 | 2012 | 30292.05 |
| 13 | 2011 | 28495.12 |
| 14 | 2010 | 29266.37 |
| 15 | 2009 | 27346.09 |
| 16 | 2008 | 27528.79 |
| 17 | 2007 | 27329.74 |
| 18 | 2006 | 26498.17 |
| 19 | 2005 | 25365.32 |
| 20 | 2004 | 24820.59 |
| 21 | 2003 | 23832.50 |
| 22 | 2002 | 22614.76 |
| 23 | 2001 | 21804.83 |
| 24 | 2000 | 21557.55 |
| 25 | 1999 | 21166.61 |
| 26 | 1998 | 20427.62 |
| 27 | 1997 | 21627.01 |
| 28 | 1996 | 22758.90 |
| 29 | 1995 | 22017.23 |
| 30 | 1994 | 20882.97 |
| 31 | 1993 | 19753.74 |
| 32 | 1992 | 18616.59 |
| 33 | 1991 | 17847.81 |
