| 序号 | 时间 (年) |
数据 (万美元) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 36326.35 |
| 8 | 2013 | 35390.65 |
| 9 | 2012 | 34085.60 |
| 10 | 2011 | 34257.15 |
| 11 | 2010 | 28842.29 |
| 12 | 2009 | 24552.67 |
| 13 | 1994 | 38280.16 |
| 14 | 1993 | 37167.40 |
| 15 | 1992 | 30474.16 |
| 16 | 1991 | 27319.38 |
| 17 | 1990 | 26389.85 |
| 18 | 1989 | 24157.14 |
| 19 | 1988 | 19012.75 |
| 20 | 1987 | 16444.70 |
| 21 | 1986 | 16884.87 |
| 22 | 1985 | 29513.65 |
| 23 | 1984 | 13924.35 |
| 24 | 1983 | 14489.88 |
| 25 | 1982 | 18131.61 |
| 26 | 1981 | 13400.10 |
| 27 | 1980 | 16891.62 |
| 28 | 1979 | 8817.08 |
| 29 | 1978 | 6979.60 |
| 30 | 1977 | 6517.62 |
