The rapid expansion of the sector immediately after independence stagnated in the 1980s, hampered by shortages in hydroelectric power, high energy costs, dilapidated transport infrastructure, and the dumping of cheap imports. However, due to urbanisation, the industry and manufacturing sectors have become increasingly important to the Kenyan economy, and this has been reflected by an increasing GDP per capita. Industrial activity, concentrated around the three largest urban centres, Nairobi, Mombasa, and Kisumu, is dominated by food-processing industries such as grain milling, beer production, and sugarcane crushing, and the fabrication of consumer goods, e.g., vehicles from kits.