| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 25.87 |
| 8 | 2014 | 19.71 |
| 9 | 2013 | 17.03 |
| 10 | 2012 | 16.30 |
| 11 | 2011 | 12.40 |
| 12 | 2010 | 17.74 |
| 13 | 2009 | 15.70 |
| 14 | 2008 | 8.49 |
| 15 | 2007 | 19.91 |
| 16 | 2006 | 20.80 |
| 17 | 2005 | 16.89 |
| 18 | 2004 | 21.09 |
| 19 | 2003 | 16.86 |
| 20 | 2002 | 15.52 |
| 21 | 2001 | 15.96 |
| 22 | 2000 | 15.09 |
| 23 | 1999 | 16.57 |
| 24 | 1998 | 16.37 |
| 25 | 1997 | 18.36 |
| 26 | 1996 | 17.54 |
| 27 | 1995 | 15.62 |
| 28 | 1994 | 14.13 |
| 29 | 1993 | 18.58 |
| 30 | 1992 | 9.22 |
| 31 | 1991 | 7.56 |
| 32 | 1990 | 8.74 |
| 33 | 1989 | 9.37 |
| 34 | 1988 | 9.32 |
| 35 | 1987 | 5.35 |
| 36 | 1986 | 4.38 |
| 37 | 1985 | 2.74 |
| 38 | 1984 | 2.80 |
| 39 | 1983 | 3.66 |
| 40 | 1982 | 3.38 |
| 41 | 1981 | 3.40 |
| 42 | 1980 | 3.35 |
| 43 | 1979 | 3.92 |
| 44 | 1978 | 3.95 |
| 45 | 1977 | 3.98 |
| 46 | 1976 | 2.49 |
