whole national population. For example: As of the 2000 Census, nearly 34 million people populated California (CA). At the same time, the national population was 281.5 million people. This gave CA a 12 percent share of the national population, roughly. Were Congress to impose a direct tax in order to raise $1 trillion before the next census, the taxpayers of CA would be required to fund 12 percent of the total amount: $120 billion. Apportionment and income taxes Before 1895, direct taxes were understood to be limited to "capitation or poll taxes" (Hylton v. United States) and "taxes on lands and buildings, and general assessments, whether on the whole property of individuals or on their whole real or personal estate" (Springer v. United States). The decision in Springer went further in declaring that all income taxes were indirect taxes—or more specifically, "within the category of an excise or duty." However, in 1895 income taxes derived from property such as interest, dividends, and rent (imposed under an 1894 Act) were treated as direct taxes by the Supreme Court in Pollock v. Farmers' Loan & Trust Co. and were ruled to be subject to the requirement of apportionment. As the income taxes imposed under the 1894 Act were not apportioned in such a manner, they were held unconstitutional. It was not the income tax per se, but the lack of a provision for its apportionment as a direct tax which made the tax unconstitutional. The resulting case law prohibiting unapportioned taxes on incomes derived from property was later eliminated by the ratification of the Sixteenth Amendment in 1913. The text of the amendment was clear in its aim: Shortly after, in 1916, the U.S. Supreme Court ruled in Brushaber v. Union Pacific Railroad that under the Sixteenth Amendment income taxes were constitutional even though unapportioned, just as the amendment had provided. In subsequent cases, the courts have interpreted the Sixteenth Amendment and the Brushaber decision as standing for the rule that the amendment allows income taxes on "wages, salaries, commissions, etc. without apportionment." No taxes on exports Article I, Section 9, Clause 5 provides a further limitation: This provision was an important protection for the southern states secured during the Constitutional Convention. With the grant of absolute power over foreign commerce given to the federal government, the states whose economies relied chiefly on exports realized that any tax laid by the new