The Year-end 2007 edition of the Bangkok Post's Economic Review has a spread on tourist arrivals. There are a couple of "interesting" comments:
"Statistics show that around half of all visitors are repeat travellers," {non sequitur conclusion} "a fact that points to the country's attractiveness as a tourist destination"
Quote Originally Posted by Phornsiri Manoharn, governor of the Tourism Authority of Thailand
Actually the TAT isn't that focussed on visitor numbers
No sirree. Next year they're aiming for a more realistic 5% increase

In the first nine months tourist arrivals were up 4% - the target was 7.5%. Arrivals from China, Singapore and Malaysia were all down sharply (and you can bet many of those Malaysian non-arrivals were cross-border sex tourists in the South, to Hat Yai and other places nearby). Proportionately the French (23.54%) and the Australians (25.11%) were the biggest increase, followed by tourists from the Middle East (16.25%) and India (16.67%). American arrivals were flat - I guess we can hope for a decline next time. Oh, and to boygeenyus' dismay (I hope), Suvarnabhumi Airport gets slammed in a number of articles