| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 28758.49 |
| 8 | 2016 | 27027.05 |
| 9 | 2015 | 26801.53 |
| 10 | 2014 | 25812.29 |
| 11 | 2013 | 25253.17 |
| 12 | 2012 | 24530.09 |
| 13 | 2011 | 23805.89 |
| 14 | 2010 | 22778.29 |
| 15 | 2009 | 22139.67 |
| 16 | 2008 | 21662.15 |
| 17 | 2007 | 20883.57 |
| 18 | 2006 | 20617.78 |
| 19 | 2005 | 19822.72 |
| 20 | 2004 | 19582.14 |
| 21 | 2003 | 19351.04 |
| 22 | 2002 | 18535.03 |
| 23 | 2001 | 18237.78 |
| 24 | 2000 | 17477.51 |
| 25 | 1999 | 17538.68 |
| 26 | 1998 | 17627.47 |
| 27 | 1997 | 16901.96 |
| 28 | 1996 | 17626.00 |
| 29 | 1995 | 16064.66 |
| 30 | 1994 | 17574.74 |
| 31 | 1993 | 16211.60 |
| 32 | 1992 | 16789.81 |
| 33 | 1991 | 17652.18 |
