| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 1.23 |
| 8 | 2016 | 0.83 |
| 9 | 2015 | 1.30 |
| 10 | 2014 | 1.13 |
| 11 | 2012 | 1.22 |
| 12 | 2011 | 1.11 |
| 13 | 2010 | 1.26 |
| 14 | 2009 | 1.26 |
| 15 | 2008 | 1.08 |
| 16 | 2007 | 1.02 |
| 17 | 2006 | 0.73 |
| 18 | 2005 | 0.56 |
| 19 | 2004 | 0.43 |
| 20 | 2003 | 0.24 |
| 21 | 1995 | 0.38 |
| 22 | 1994 | 0.44 |
| 23 | 1993 | 0.56 |
| 24 | 1992 | 0.49 |
| 25 | 1991 | 0.40 |
| 26 | 1990 | 0.44 |
| 27 | 1989 | 0.45 |
| 28 | 1988 | 0.42 |
| 29 | 1987 | 0.39 |
| 30 | 1986 | 0.28 |
| 31 | 1985 | 0.30 |
| 32 | 1984 | 0.28 |
| 33 | 1983 | 0.17 |
| 34 | 1982 | 0.17 |
| 35 | 1981 | 0.24 |
| 36 | 1980 | 0.12 |
