| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 33083.91 |
| 8 | 2016 | 31944.34 |
| 9 | 2015 | 31927.16 |
| 10 | 2014 | 31768.37 |
| 11 | 2013 | 29746.88 |
| 12 | 2012 | 27418.69 |
| 13 | 2011 | 29793.56 |
| 14 | 2010 | 29237.54 |
| 15 | 2009 | 26380.45 |
| 16 | 2008 | 26794.16 |
| 17 | 2007 | 25906.18 |
| 18 | 2006 | 25880.59 |
| 19 | 2005 | 23931.25 |
| 20 | 2004 | 23996.69 |
| 21 | 2003 | 24968.26 |
| 22 | 2002 | 24731.01 |
| 23 | 2001 | 24362.70 |
| 24 | 2000 | 25468.22 |
| 25 | 1999 | 25989.00 |
| 26 | 1998 | 26709.15 |
| 27 | 1997 | 27648.80 |
| 28 | 1996 | 28184.36 |
| 29 | 1995 | 27101.17 |
| 30 | 1994 | 26502.70 |
| 31 | 1993 | 26128.23 |
| 32 | 1992 | 25635.27 |
| 33 | 1991 | 25891.15 |
