| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 41.93 |
| 8 | 2014 | 45.22 |
| 9 | 2013 | 48.01 |
| 10 | 2012 | 46.57 |
| 11 | 2011 | 41.35 |
| 12 | 2010 | 36.87 |
| 13 | 2009 | 35.13 |
| 14 | 2008 | 35.33 |
| 15 | 2007 | 36.28 |
| 16 | 2006 | 34.20 |
| 17 | 2005 | 31.79 |
| 18 | 2004 | 22.17 |
| 19 | 2003 | 17.41 |
| 20 | 2002 | 15.95 |
| 21 | 2001 | 17.25 |
| 22 | 2000 | 16.79 |
| 23 | 1999 | 17.20 |
| 24 | 1998 | 17.02 |
| 25 | 1997 | 18.84 |
| 26 | 1996 | 18.25 |
| 27 | 1995 | 16.85 |
| 28 | 1994 | 14.23 |
| 29 | 1993 | 14.06 |
| 30 | 1992 | 13.60 |
| 31 | 1991 | 11.44 |
| 32 | 1990 | 10.64 |
| 33 | 1974 | 2.26 |
| 34 | 1973 | 1.73 |
| 35 | 1972 | 1.37 |
