 Industrial production in the city has experienced a rapid boom since the 1990s, with average annual growth of 19.1 percent from 1991–95, 15.9 percent from 1996–2000, and 20.9 percent during 2001–2003.In addition to eight existing industrial parks, Hanoi is building five new large-scale industrial parks and 16 small- and medium-sized industrial clusters.The non-state economic sector is expanding fast, with more than 48,000 businesses currently operating under the Enterprise Law (as of 3/2007).