| 序号 | 时间 (年) |
数据 (百万美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 2.33 |
| 8 | 2016 | 1.80 |
| 9 | 2015 | 2.41 |
| 10 | 2014 | 4.22 |
| 11 | 2013 | 0.14 |
| 12 | 2012 | 0.21 |
| 13 | 2011 | 0.53 |
| 14 | 2010 | 0.08 |
| 15 | 2009 | 0.00 |
| 16 | 2008 | 0.16 |
| 17 | 2007 | 9.40 |
| 18 | 2006 | 0.02 |
| 19 | 2005 | 17.34 |
| 20 | 2004 | 18.45 |
| 21 | 2003 | 15.47 |
| 22 | 2002 | 0.00 |
| 23 | 2000 | 19.97 |
| 24 | 1999 | 0.03 |
| 25 | 1998 | 19.65 |
| 26 | 1997 | 18.50 |
| 27 | 1996 | 17.85 |
| 28 | 1995 | 14.74 |
| 29 | 1994 | 18.36 |
| 30 | 1993 | 20.50 |
| 31 | 1992 | 19.17 |
| 32 | 1990 | 15.38 |
| 33 | 1989 | 16.48 |
| 34 | 1988 | 18.66 |
| 35 | 1987 | 15.69 |
| 36 | 1986 | 16.31 |
| 37 | 1985 | 15.96 |
| 38 | 1984 | 1.01 |
| 39 | 1983 | 9.25 |
| 40 | 1982 | 8.52 |
| 41 | 1980 | 14.45 |
