SINGAPORE - Visitor arrivals in Singapore fell 11.5 per cent in the six months to June from a year ago as the global economic crisis and swine flu outbreak hit travel demand, the tourism board said Thursday.

The city-state received 4.5 million visitors from January to June, with those from Indonesia, China, Australia, India and Malaysia accounting for more than 50 percent of the arrivals, the Singapore Tourism Board said.

Revenues tumbled 13.5 per cent to 6.4 billion Singapore dollars (4.43 billion US), it said.

The board said it expects 9.0-9.5 million travellers this year, generating an expected 12.0-12.5 billion dollars in revenues.

Singapore received 10.1 million visitors last year, missing its target of 10.8 million as travel slowed in the second half due to the global downturn.