Beijing's economy ranks among the most developed and prosperous in China. In 2013, the municipality's nominal gross domestic product was CN￥1.95 trillion. It was about 3.43% of the country's total output, and ranked 13th among province-level administrative units. Per capita GDP, at CN￥93,213 in nominal terms and Int$21,948 at purchasing power parity, was 2.2 times the national average and ranked second among province-level administrative units. The city has a post-industrial economy that is dominated by the tertiary sector, which generated 76.9% of output, followed by the secondary sector at 22.2% and the primary sector at 0.8%. The economy, which tripled in size from 2004 to 2012, grew at an annual rate of 7.7% in 2013. Owing to the concentration of state owned enterprises in the national capital, Beijing in 2013 had more Fortune Global 500 Company headquarters than any other city in the world. The city also ranked No. 4 in the number of billionaire residents after Moscow, New York and Hong Kong. In 2012, PricewaterhouseCoopers rated Beijing's overall economic influence as No. 1 in China. Beijing is home to 52 Fortune Global 500 companies, the most in the world, and over 100 of the largest companies in China. Finance is one of the most important industries. By the end of 2007, there were 751 financial organizations in Beijing generating revenue of 128.6 billion RMB, 11.6% of the total financial industry revenue of the entire country. That also accounts for 13.8% of Beijing's GDP, the highest percentage of any Chinese city. In the 2017 Global Financial Centres Index, Beijing was ranked as having the 16th most competitive financial center in the world and sixth most competitive in Asia. In 2010, Beijing's nominal GDP reached 1.37 trillion RMB. Its per capita GDP was 78,194 RMB. In 2009, Beijing's nominal GDP was 1.19 trillion RMB, a growth of 10.1% over the previous year. Its GDP per capita was 68,788 RMB, an increase of 6.2% over 2008. In 2009, Beijing's primary, secondary, and tertiary industries were worth 11.83 billion RMB, 274.31 billion RMB, and 900.45 billion RMB respectively. Urban disposable income per capita was 26,738 yuan, a real increase of 8.1% from the previous year. Per capita pure income of rural residents was 11,986 RMB, a real increase of 11.5%. The Engel's coefficient of Beijing's urban residents reached 31.8% in 2005, while that of the rural residents was 32.8%, declining 4.5 and 3.9 percentage points respectively compared to 2000. Beijing's real estate and automobile sectors have continued to boom in recent years. In 2005, a total of of housing real estate was sold, for a total of 175.88 billion RMB. The total number of cars registered in Beijing in 2004 was 2,146,000, of which 1,540,000 were privately owned. The Beijing central business district, centered on the Guomao area, has been identified as the city's new central business district, and is home to a variety of corporate regional headquarters, shopping precincts, and high-end housing. Beijing Financial Street, in the Fuxingmen and Fuchengmen area, is a traditional financial center. The Wangfujing and Xidan areas are major shopping districts. Zhongguancun, dubbed "China's Silicon Valley", continues to be a major center in electronics and computer-related industries, as well as pharmaceuticals-related research. Meanwhile, Yizhuang, located to the southeast of the urban area, is becoming a new center in pharmaceuticals, information technology, and materials engineering. Shijingshan, on the western outskirts of the city, is among the major industrial areas. Specially designated industrial parks include Zhongguancun Science Park, Yongle Economic Development Zone, Beijing Economic-technological Development Area, and Tianzhu Airport Industrial Zone. Agriculture is carried on outside the urban area, with wheat and maize being the main crops. Vegetables are also grown closer to the urban area in order to supply the city. Beijing is increasingly becoming known for its innovative entrepreneurs and high-growth startup companies. This culture is backed by a large community of both Chinese and foreign venture capital firms, such as Sequoia Capital, whose head office in China is in Chaoyang, Beijing. Though Shanghai is seen as the economic center of China, this is typically based on the numerous large corporations based there, rather than for being a center for entrepreneurship. Less legitimate enterprises also exist. Urban Beijing is known for being a center of infringed goods; anything from the latest designer clothing to DVDs can be found in markets all over the city, often marketed to expatriates and international visitors. The development of Beijing continues at a rapid pace, and the vast expansion has created a multitude of problems for the city. Beijing is known for its smog as well as the frequent "power-saving" programmes instituted by the government. To reduce air pollution, a number of major industries have been ordered to reduce emissions or leave the city. Beijing Capital Steel, once one of the city's largest employers and its single biggest polluter, has been relocating most of its operations to Tangshan, in nearby Hebei Province.
