| 序号 | 时间 (年) |
数据 (万美元) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 190101.42 |
| 8 | 2013 | 188757.59 |
| 9 | 2012 | 210857.62 |
| 10 | 2011 | 191186.93 |
| 11 | 2010 | 141059.10 |
| 12 | 2009 | 120335.86 |
| 13 | 1982 | 233.09 |
| 14 | 1981 | 73.51 |
| 15 | 1980 | 929.81 |
| 16 | 1979 | 1058.05 |
| 17 | 1978 | 533.47 |
| 18 | 1977 | 1144.56 |
