According to the Travel Industry Association of America's (TIA) Industry Performance Indicators (IPI), the month of April 2007 revealed an increased in domestic air RPMs by 0.2 percent and international air RPMs rose 3.4 percent.
Hotel/motel room demand increased 0.2 percent and room revenue increased 5.3 percent from twelve months earlier. Airline employment was up 0.3 percent and lodging employment increased 2.4 percent from April 2006.
The IPI are a set of monthly measurements that provide a quick snapshot of recent trends in travel-related industry segments. Data are obtained from both the private sector and government sources.
April 2007 Industry Performance Indicators

Sources & Notes:
Air Traffic: Air Transport Association, Bureau of Labor Statistics. RPM= Revenue Pasenger Miles.
Rail Passenger Traffic: Amtrak. RPM= Revenue Passenger Miles.
Auto Travel: U.S. Bureau of Census, Department of Energy, Federal Highway Administration.
(demand for Motor Gasoline is thousands of barrels per day)
Hotel/Motel: Smith Travel Research, Bureau of Labor Statistics.
(demand for Commercial Lodging is unadjusted room nights sold)
Restaurants: U.S. Bureau of Census, Bureau of Labor Statistics
National Parks: National Park Service
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