The publishing business in Thailand has steadily grown since 2003, with a small decline in 2006, due to political instabilities. The estimated value of trade book sales in 2007 was around 18 billion baht, of which 88% was obtained from the sales of 110 large and medium sized publishing houses. The rest was from trade sales of 381 small size publishers, who were registered members of the Publishers and Booksellers Association of Thailand.