immigrants from other parts of Europe, the Middle East, and China began; many were encouraged by government-established immigration programs and lenient immigration policies. During the 20th century, Venezuela, along with the rest of Latin America, received millions of immigrants from Europe. This was especially true post-World War II, as a consequence of war-ridden Europe. During the 1970s, while experiencing an oil-export boom, Venezuela received millions of immigrants from Ecuador, Colombia, and the Dominican Republic. Due to the belief that this immigration influx depressed wages, some Venezuelans opposed European immigration. The Venezuelan government, however, were actively recruiting immigrants from Eastern Europe to fill a need for engineers. Millions of Colombians, as well as Middle Eastern and Haitian populations would continue immigrating to Venezuela into the early 21st century. According to the World Refugee Survey 2008, published by the U.S. Committee for Refugees and Immigrants, Venezuela hosted a population of refugee and asylum seekers from Colombia numbering 252,200 in 2007, and 10,600 new asylum seekers entered Venezuela in 2007. Between 500,000 and one million illegal immigrants are estimated to be living in the country. The total indigenous population of the country is estimated at 500 thousand people (2.8% of the total), distributed among 40 indigenous peoples. There are three uncontacted tribes living in Venezuela. The Constitution recognizes the multi-ethnic, pluri-cultural, and multilingual character of the country and includes a chapter devoted to indigenous peoples' rights, which opened up spaces for their political inclusion at national and local level in 1999. Most indigenous peoples are concentrated in eight states along Venezuela's borders with Brazil, Guyana, and Colombia, and the majority groups are the Wayuu in the west, the Warao in the east, the Yanomami installed in the south, and the Pemon which are mostly in the southeast of Venezuela. Languages Although most residents are monolingual Spanish speakers, many languages are spoken in Venezuela. In addition to Spanish, the Constitution recognizes more than thirty indigenous languages, including Wayuu, Warao, Pemón, and many others for the official use of the indigenous peoples, mostly with few speakers – less than 1% of the total population. Wayuu is the most spoken indigenous language, with 170,000 speakers. Immigrants, in addition to Spanish, speak their own languages. Chinese (400,000), Portuguese (254,000), and Italian (200,000) are the most-spoken languages in Venezuela after the official language of Spanish. Arabic is spoken by Lebanese and Syrian colonies on Isla de Margarita, Maracaibo,