Amtrak serves more than 500 destinations in 46 states and three Canadian provinces,[2] operating more than 300 trains each day over 21,300 miles (34,000 km) of track. Some track sections allow trains to run as fast as 150 mph (240 km/h). In fiscal year 2015, Amtrak served 30.8 million passengers and had $2.185 billion in revenue,[3] while employing more than 20,000 people.[4] Nearly two-thirds of passengers come from the 10 largest metropolitan areas; 83% of passengers travel on routes shorter than 400 miles (644 km).[5] Its headquarters is at Union Station in Washington, D.C.[6]