Norway included a subordinate category to the market town, the "small seaport" (Norwegian "lossested" or "ladested"), which was a port or harbor with a monopoly to import and export goods and materials in both the port and a surrounding outlying district. Typically, these were locations for exporting timber, and importing grain and goods. Local farm goods and timber sales were all required to pass through merchants at either a small seaport or a market town prior to export. This encouraged local merchants to ensure trading went through them, which was so effective in limiting unsupervised sales (smuggling) that customs revenues increased from less than 30% of the total tax revenues in 1600 to more than 50% of the total taxes by 1700.