From the later half of the 19th century, the tin produced on the two islands was one-fifth of the total world output, but five-eighths of the income went into the Royal Treasury of the Netherlands.

• 从19世纪下半叶，两个岛屿的锡产量已达世界产量的五分之一，收入有八分之五进入荷兰皇家国库。