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For the laws relating to the customs, see art. Tariff. The Continental Congress desired to have a revenue from customs, but the States would not all agree to this. From 1789 on, a great part of the revenue of the Government has been derived from this source, about five-sixths from 1789 to 1830, except in war-time, sometimes more than nine-tenths in the period from 1837 to 1861, and from one-half to three-fifths in the period since 1868. At first amounting to about $3,000,000 per annum, customs have of recent years averaged about $200,000,000.