Tourist arrivals in Thailand may fall less than was originally feared this year however tax revenue may be worse than expected due to the severity of the economic slump Thai Prime Minister Abhisit Vejjajiva said on Tuesday. "We had expected the arrivals number to fall eighteen or twenty percent, but the latest projection is eleven percent," Abhisit told reporters after a weekly cabinet meeting. He said tourism had started to recover after Government efforts to promote the sector, which employs 1.8 million people and accounts for about 6 percent of GDP.