With no doctors or hospitals nearby, the Norwegian Colony was short-lived. The Olsen family lost seven of their ten children, while Ole Anderson, Lars Pederson, and George Hansen all died in 1901 due to a diphtheria epidemic. Newbury Park was a more established community than Thousand Oaks at the turn of the 20th century. A few lots existed early in the 1900s, wedged between Borchard land on the south and Friedrich land on the north. The Janss family, developers of Southern California subdivisions, purchased in the early 20th century. They eventually created plans for a "total community", and the name remains prominently featured in the city. Despite early aspirations, no large subdivisions were developed until the 1920s. The development was slow and hampered even more under the Great Depression of the 1930s. Besides agriculture, the movie industry became an important industry in the 1920s and 1930s. Between 1950 and 1970, Conejo Valley experienced a population boom, and increased its population from 3,000 to 30,000 residents. From 3,500 residents in 1957, Thousand Oaks had over 103,000 inhabitants by 1989. While ranching and agriculture were the dominant industries until the 1950s, a number of new businesses appeared throughout the 1960s and 1970s. Particularly many high-tech firms moved to Thousand Oaks in the '60s and '70s. Packard Bell and Technology Instrument Company were two high-technology businesses that moved into Newbury Park's industrial park in the 1960s. Other companies that followed included Westinghouse Astroelectronics Laboratory, Semtech Corporation, Purolator Inc., and Westland Plastics. Jungleland USA put Thousand Oaks on the map in the 1920s and helped attract Hollywood producers to the city. Hundreds of movies have been filmed in Thousand Oaks. Some of the first films to be made here were "The Birth of a Nation" (1915) at Jungleland USA and "Roaring Ranch" (1930) at the Stagecoach Inn. Thousand Oaks Boulevard was featured in the "Walls of Jericho" scenes in the film "It Happened One Night" (1934). A western village was erected at California Lutheran University for the filming of "Welcome to Hard Times" (1967), while Elvis Presley and John Wayne starred in several westerns made in Wildwood Regional Park. A nearby road, Flaming Star Avenue, is named after the film "Flaming Star" (1960) starring Elvis Presley, which was filmed here.