The creation of the Lake District National Park in 1951, with strict control over new development, prevented any expansion of the town beyond its pre-war borders. Keswick's population has remained stable at a little below 5,000 residents. The town's reliance on tourism increased in 2006 when Cumberland Pencils moved production from Keswick to Lillyhall, Workington, only the Derwent Pencil Museum remaining at the old site. At the beginning of the 21st century, more than 60 per cent of the population were employed in hotels, restaurants and distribution. A survey of retail premises in 2000 found that more than ten per cent were outdoor clothes shops, a similar proportion were cafés or restaurants, and more than eight per cent were gift shops. The age profile of the Keswick population is significantly higher than the English average. In 2011 children under 10 made up 7.6 per cent of the town's population, compared with 11.9 per cent for England as a whole. Between ages 10 and 20 the comparable figures are 10.2 and 12.1; and from ages 20 to 44, 25.9 as against 34.3. The percentage of Keswick's population aged 45 and upwards is above the national average, the largest difference being within the 75- to 84-year-old bracket, which contains 9.6 per cent of Keswick's population compared with a national average of 5.5. Figures from the same census show that Keswick has fewer than average "large employers and higher managerial occupations" and more small employers and self-employed people. Long-term unemployment is considerably below the average for England.