| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 20058.65 |
| 8 | 2016 | 19481.63 |
| 9 | 2015 | 18984.87 |
| 10 | 2014 | 19111.92 |
| 11 | 2013 | 19285.87 |
| 12 | 2012 | 19497.31 |
| 13 | 2011 | 19650.55 |
| 14 | 2010 | 19252.36 |
| 15 | 2009 | 19961.66 |
| 16 | 2008 | 20705.35 |
| 17 | 2007 | 19844.45 |
| 18 | 2006 | 17723.27 |
| 19 | 2005 | 16889.70 |
| 20 | 2004 | 16259.34 |
| 21 | 2003 | 15232.18 |
| 22 | 2002 | 15017.40 |
| 23 | 2001 | 14689.76 |
| 24 | 2000 | 14788.15 |
| 25 | 1999 | 13376.67 |
| 26 | 1998 | 12420.62 |
| 27 | 1997 | 11401.41 |
| 28 | 1996 | 10579.90 |
| 29 | 1995 | 9826.48 |
| 30 | 1994 | 8893.60 |
| 31 | 1993 | 7741.96 |
| 32 | 1992 | 7351.71 |
| 33 | 1991 | 6808.04 |
