For decades Salford's economy was heavily dependent on manufacturing industry, especially textiles and engineering. However, since the Second World War, Salford has experienced decades of growing unemployment as these sectors diminished and new sectors located out of town in areas with better transport links. Between 1965 and 1991 the city lost over 49,000 jobs, or more than 32% of its employment base. Several factors contributed to this decline, not least changes in the national and international economies, the introduction of new technology and the concentration of investment in London and South East England. The biggest job losses were experienced in Salford's traditional industries and although the service sector expanded during this period, it was unable to compensate for the decline in manufacturing.