| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 22161.82 |
| 8 | 2016 | 20386.42 |
| 9 | 2015 | 19607.05 |
| 10 | 2014 | 18732.44 |
| 11 | 2013 | 18196.01 |
| 12 | 2012 | 17349.17 |
| 13 | 2011 | 16485.24 |
| 14 | 2010 | 16463.69 |
| 15 | 2009 | 15755.20 |
| 16 | 2008 | 16003.79 |
| 17 | 2007 | 15639.10 |
| 18 | 2006 | 15105.79 |
| 19 | 2005 | 14609.79 |
| 20 | 2004 | 14237.53 |
| 21 | 2003 | 13764.57 |
| 22 | 2002 | 13401.23 |
| 23 | 2001 | 13232.84 |
| 24 | 2000 | 13160.67 |
| 25 | 1999 | 12927.21 |
| 26 | 1998 | 12854.95 |
| 27 | 1997 | 13313.31 |
| 28 | 1996 | 13012.84 |
| 29 | 1995 | 12635.03 |
| 30 | 1994 | 12418.11 |
| 31 | 1993 | 12237.68 |
| 32 | 1992 | 12319.72 |
| 33 | 1991 | 12619.10 |
