Wholesale and retail trade is the largest sector in the city's economy, contributing 24 percent of Bangkok's gross provincial product. It is followed by manufacturing (14.3 percent); real estate, renting and business activities (12.4 percent); transport and communications (11.6 percent); and financial intermediation (11.1 percent). Bangkok alone accounts for 48.4 percent of Thailand's service sector, which in turn constitutes 49 percent of GDP. When the Bangkok Metropolitan Region is considered, manufacturing is the most significant contributor at 28.2 percent of the gross regional product, reflecting the density of industry in the Bangkok's neighbouring provinces. The automotive industry based around Greater Bangkok is the largest production hub in Southeast Asia. Tourism is also a significant contributor to Bangkok's economy, generating 427.5 billion baht ($13.38 billion) in revenue in 2010.