项目年份 |
1680 |
1730 |
1780 |
1830 |
黄金 |
5.0 |
7.8 |
0.2 |
3.0 |
树胶 |
8.1 |
9.4 |
12.0 |
71.6 |
奴隶 |
55.3 |
64.3 |
86.5 |
1.9 |