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for events through 1899, see History of California before 1900.'' After 1900, California continued to grow rapidly and soon became an agricultural and industrial power. The economy was widely based on specialty agriculture, oil, tourism, shipping, film, and after 1940 advanced technology such as aerospace and electronics industries - along with a significant military presence. The films and stars of Hollywood helped make the state the "center" of worldwide attention. California became an American cultural phenomenon; the idea of the "California Dream" as a portion of the larger American Dream of finding a better life drew 35 million new residents from the start to the end of the 20th century (1900–2010). Silicon Valley became the world's center for computer innovation. ==California demographics== California is now the most populous state in the United States. If it were an independent country, California would rank 34th in population in the world. California has had waves of immigration and emigration over the years. The first big wave was the California Gold Rush starting in 1848 of miners, businessmen, farmers, loggers, etc. as well as their many supporters. There were fewer than 10,000 females in a total California population (not including Native Americans who were not counted) of about 120,000 residents in 1850. About 3.0% of the gold rush Argonauts before 1850 were female or about 3,500 female Gold Rushers, compared to about 115,000 male California Gold Rushers. Massive immigration from mostly other states continued throughout the nineteenth century.〔U.S. Immigration Statistics yearbook; pg. 5 () accessed 11 Jan 2014〕〔"Historical Statistics of the United States, 1789–1945"; () Accessed 14 Apr 2011〕 California did not reach a "normal" male to female ratio of about one to one until the 1950 census. California for over a century was short on females. The 1900 census showed emigrations down to "only" a 20% growth rate. The early 1900s showed a massive population increase of over 60% between 1900 and 1910. The population more than doubled again in the next 20 years by 1930. Foreign immigration largely ceased during the Great Depression, as immigration to the U.S. was held to a low of 23,068 per year by 1933, and many foreign workers were deported. There were not enough jobs to go around. Once World War II "solved" the problems of the Great Depression there was a rapidly increasing buildup of U.S. workers in California as wartime industries boomed. Most of these workers were from other states as they settled in California and increased the California population to 10,586,223 by 1950. Immigration to the U.S. only started to increase significantly in 1946, when immigration to all of the U.S. was back up to 108,721 per year〔 The continuing prosperity and emigration from other states and immigration from other countries in the 1950s and 1970s almost doubled the California population again to 19,953,134 by 1970. The 1970-2010 population growth has still been substantial but has slowed to "only" about a 15% growth rate per decade. By 2010 the California population growth rate slowed slightly to 10%. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「History of California 1900 to present」の詳細全文を読む スポンサード リンク
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