| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 34599.31 |
| 8 | 2016 | 31843.54 |
| 9 | 2015 | 31494.19 |
| 10 | 2014 | 30254.16 |
| 11 | 2013 | 28966.12 |
| 12 | 2012 | 27838.65 |
| 13 | 2011 | 25781.96 |
| 14 | 2010 | 24478.91 |
| 15 | 2009 | 23882.42 |
| 16 | 2008 | 28032.54 |
| 17 | 2007 | 26153.01 |
| 18 | 2006 | 23131.53 |
| 19 | 2005 | 20521.27 |
| 20 | 2004 | 18069.61 |
| 21 | 2003 | 16377.24 |
| 22 | 2002 | 14367.80 |
| 23 | 2001 | 12677.12 |
| 24 | 2000 | 11546.97 |
| 25 | 1999 | 10887.37 |
| 26 | 1998 | 10295.38 |
| 27 | 1997 | 9702.36 |
| 28 | 1996 | 9181.58 |
| 29 | 1995 | 8379.56 |
| 30 | 1994 | 7695.73 |
| 31 | 1993 | 6985.27 |
| 32 | 1992 | 7077.84 |
| 33 | 1991 | 11909.66 |
