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.[59] Keswick's population has remained stable at a little below 5,000 residents.[n 3] 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.[61] At the beginning of the 21st century, more than 60 per cent of the population were employed in hotels, restaurants and distribution.