Ethnic Chinese entrepreneurs are estimated to control 60 to 70 percent of the Filipino economy. Chinese Filipinos, comprising 1 of the population, control many of the Philippines largest and most lucrative department store chains, supermarkets, hotels, shopping malls, airlines and fast-food restaurants in addition to all the major financial services corporations, banks and stock brokerage firms, and they dominate the nations wholesale distribution networks, shipping, banking, construction, textiles, real estate, personal computer, semiconductors, pharmaceutical, media, and industrial manufacturing industries. The Chinese are also involved in the processing and distribution of pharmaceutical products. More than 1000 firms are involved in this industry, with most being small and medium-sized companies with a total capitalization of 1.2 billion pesos. Chinese Filipinos also control six out of the ten English-language newspapers in Manila, including the one with the largest daily circulation. Stores and restaurants around the country are owned by most of the leading entrepreneurs of Chinese extraction are regularly featured in Manila newspapers which attracted great public interest and were used to illustrate the Chinese communitys strong economic influence. Of the 66 percent remaining part of the economy in the Philippines held by either ethnic Chinese or Filipinos, the Chinese control 35 percent of all total sales. Filipinos of Chinese origin control an estimated 50 to 60 percent of non-land share capital in the Philippines, and as much as 35 percent of total sales are attributed to the largest public and private firms controlled by ethnic Chinese. They essentially focus on sectors such as semiconductors and chemicals, real estate, land, and property development, banking, engineering, construction, fiber, textiles, finance, consumer electronics, food, and personal computers. A third of the top 500 companies on the Philippines stock exchange are Chinese-owned. Of the top 1000 firms, Chinese Filipinos owned 36 percent. Among the top 100 companies, 43 percent were owned by Chinese-Filipinos. Between 1978 and 1988, Chinese controlled 146 of the countrys 494 top companies. Ethnic Chinese are estimated to control over one-third of the 1000 largest corporations and Chinese entrepreneurs control 47 of the 68 locally owned public companies. 55 percent of overall Filipino private business is also generated by ethnic Chinese. Chinese owned companies account for 66 percent of the sixty largest commercial entities. In 2015, the top four wealthiest people in the Philippines (and ten out of the top fifteen) were ethnic Chinese.
Question: How many years passed when Chinese controlled 146 of the countries 494 top companies?
Answer: 10