The population is approximately 540,000 people in the city proper. Roughly 30% of Paraguay's 6 million people live within Greater Asunción. Sixty-five percent of the total population in the city are under the age of 30. The population has increased greatly during the last few decades as a consequence of internal migration from other Departments of Paraguay, at first because of the economic boom in the 1970s, and later because of economic recession in the countryside. The adjacent cities in the Gran Asunción area, such as Luque, Lambaré, San Lorenzo, Fernando de la Mora and Mariano Roque Alonso, have absorbed most of this influx due to the low cost of the land and easy access to Asunción. The city has ranked as the least expensive city to live in for five years running by Mercer Human Resource Consulting. Population by sex and age according to the 2002 census  Approximately 90% of the population of Asunción professes Catholicism. The Catholic Archdiocese of Asunción covers an area of including the city and surrounding area and has a total population of 1,780,000 of whom 1,612,000 are Catholic. The Catholic Archbishop is Eustaquio Pastor Cuquejo Verga, C.SS.R. In Paraguay's capital there are also places of worship of other Christian denominations, the Church of Jesus Christ of Latter-day Saints, as well as of other religions including Islam, Buddhism and Judaism. Most people in Paraguay speak one of two languages as their principal language: Paraguayan Spanish (spoken by 56.9% of the population) and Guaraní (spoken by 90.1%). 27.4% of the population speaks the Jopará dialect, a mix of Guaraní with loanwords from Spanish (Creole). Other languages are represented by 4.5% of the population. The city has a large number of both public and private schools. The best-known public schools are the Colegio Nacional de la Capital (which is one of the oldest schools in the city, founded in 1877), Colegio Técnico Nacional, Colegio Nacional Presidente Franco and Colegio Nacional Asunción Escalada. The best-known private schools are, American School of Asunción, Colegio San José, St. Annes School, Colegio del Sol, Colegio Santa Clara, Colegio Goethe and Colegio de la Asunción, Colegio Las Almenas, Colegio Campoalto, Colegio Dante Alighieri, Colegio San Francisco, Colegio San Ignacio de Loyola, Colegio Santa Teresa de Jesús, Colegio Inmaculado Corazón de María, Salesianito, Colegio Cristo Rey, Colegio Internacional.