There were two significant migration trends that affected population figures in the 1970s and the 1980s. First was a trend of migration from village to city, which put extra stress on urban areas. As of the early 1980s, thirty cities had 100,000 or more residents, up from twenty-one in 1970. Metro Manila's population was 5,924,563, up from 4,970,006 in 1975, marking an annual growth rate of 3.6 percent. This figure was far above the national average of 2.5 percent. Within Metro Manila, the city of Manila itself was growing more slowly, at a rate of only 1.9 percent per annum, but two other cities within this complex, Quezon City and Caloocan, were booming at rates of 4 percent and 3.5 percent, respectively.

A National Housing Authority report revealed that, in the early 1980s, one out of four Metro Manila residents was a squatter. This figure represented a 150 percent increase in a decade in the number of people living in shantytown communities, evidence of continuing, virtually uncontrolled, rural-urban migration. The city of Manila had more than 500,000 inhabitants and Quezon City had 371,000 inhabitants in such neighborhoods. Moreover, rural-urban migrants, responding to better employment opportunities in peripheral metropolitan cities such as Navotas, had boosted the percentage of squatters in that city's total population.

A second major migration pattern consisted of resettlement from the more densely to the less densely populated regions. As a result of a population-land ratio that declined from about one cultivated hectare per agricultural worker in the 1950s to about 0.5 hectare by the early 1980s, thousands of Filipinos had migrated to the agricultural frontier on Mindanao. According to the 1980 census, six of the twelve fastest growing provinces were in the western, northern, or southern Mindanao regions, and a seventh was the frontier province of Palawan. Sulu, South Cotabato, Misamis Oriental, Surigao del Norte, Agusan del Norte, and Agusan del Sur provinces all had annual population growth rates of 4 percent or more, a remarkable statistic given the uncertain law-and-order situation on Mindanao. Among the fastestgrowing cities in the late 1970s were General Santos (10 percent annual growth rate), Iligan (6.9), Cagayan de Oro (6.7), Cotabato (5.7), Zamboanga (5.4), Butuan (5.4), and Dipolog (5.1)--all on Mindanao.

By the early 1980s, the Mindanao frontier had ceased to offer a safety valve for land-hungry settlers. Hitherto peaceful provinces had become dangerous tinderboxes in which mounting numbers of Philippine army troops and New People's Army insurgents carried on a sporadic shooting war with each other and with bandits, "lost commands," millenarian religious groups, upland tribes, loggers, and Muslims (see The Counterinsurgency Campaign , ch. 5). Population pressures also created an added obstacle to land reform. For years, there had been demands to restructure land tenure so that landlords with large holdings could be eliminated and peasants could become farm owners. In the past, land reform86b rm had been opposed by landlords. In the 1990s there simply was not enough land to enable a majority of the rural inhabitants to become landowners. International migration has offered better economic opportunities to a number of Filipinos without, however, reaching the point where it would relieve population pressure. Since the liberalization of United States immigration laws in 1965, the number of people in the United States having Filipino ancestry had grown substantially to 1,406,770 according to the 1990 United States census. In the fiscal year ending September 30, 1990, the United States Embassy in Manila issued 45,189 immigrant and 85,128 temporary visas, the largest number up to that time.

In addition to permanent residents, in the late 1980s and early 1990s, more than half a million temporary migrants went abroad to work but maintained a Philippine residence. This number included contract workers in the Middle East and domestic servants in Hong Kong and Singapore, as well as nurses and physicians who went to the United States for training and work experience, a fair proportion of whom managed to become permanent residents. The remittances sent back to the Philippines by migrants have been a substantial source of foreign exchange.

Data as of June 1991