In 1999, the Euro currency was introduced while Bill Clinton was acquitted in his impeachment trial. Several significant tornadoes hit Oklahoma and the anti-globalization movement began large protests. The 2000 census recorded a population of 281 million people, concentrated in the South and West. The Supreme Court ruled that Microsoft violated antitrust laws and George W. Bush and Al Gore had a disputed election decided by the Supreme Court. Hillary Clinton was also elected to the Senate.