Complex sentence: The United States is Thailand's third largest trading partner after Japan and China; in 2006 merchandise imports from Thailand totaled $22.5 billion, and merchandise exports totaled $8.2 billion.
Split into simpler sentences: The United States is Thailand's third largest trading partner after Japan and China. In 2006 merchandise imports from Thailand totalled US $22.5 billion, and merchandise exports totalled US $8.2 billion.