The population of Getafe, estimated at 159,300 in 2007 by the Instituto Nacional de Estadística, is unevenly distributed across a number of neighborhoods: Sector III, San Isidro, Perales del Río, Las Margaritas, La Alhóndiga, Juan de la Cierva, Getafe Norte, El Bercial, and Getafe Central. The Getafe Centro neighborhood has the most housing, with 12,574 units; the Juan de la Cierva neighborhood is a close second with 12,072 housing units. The least developed in terms of housing are the neighborhoods of Perales del Río and El Bercial, with 1815 and 1820 units respectively, though these numbers are expected to increase shortly due to a number of recently implemented urban initiatives. The most populous neighborhoods are those of Juan de la Cierva (32,925 inhabitants), Getafe Centro (32,160 inhabitants), and Sector III (24,217 inhabitants). 30,000 inhabitants of Getafe are between the ages of 20 and 40, and 24 inhabitants are 100 years old or more (21 women, 3 men). Women out-number men in Getafe, numbering 79,514 women to 78,849 men. The foreign population of Getafe increases every year, and makes up about 9% of the total population. Immigrants generally come from Latin America, شرقی اوروپا, and باتی اوروپا. The constant annual growth rate falls between 0.01% and 3.00%, birth rate falls between 0.01% and 8%, and the death rate falls between 4% and 8%. From 1996 to 2002, the growth rate of Getafe fell between 5 and 10%. The median age of inhabitants is less than 22 years. More than 85% of the population consider themselves Catholic, but only 20% of these people are actual active members of Catholic congregations. The population of Getafe has experienced strong growth during the second half of the 20th century. From the Middle Ages to 1900, the population varied between 2,500 and 6,000 inhabitants. In 1950, the population was 12,254; in 1970, the population was 69,424; in 1977, 124,601. These figures demonstrate the population growth spurt that began in 1960 and continues to the present day. At present, the city's population is generally growing at a continual, moderate rate, at approximately 1,700 people per year. The year 2006 was the first year since the 17th century that the population actually decreased, falling by 2,043 people. Getafe is listed as the 41st most populous city in Spain, after سالامانکا and before لقرنیو. Within the community of Madrid, Getafe is the 7th most populous city, after آلکورکون and before تورقون دی اردوز. An inhabitant of Getafe is called getafeño or getafense, though the latter is more common. The postal codes of the city are: 28901, 28902, 28903, 28904, 28905, 28907, 28909.