New York City borough of Manhattan. Even including the two woodland areas, its population density was in 2017, the sixth-most-densely populated commune in France after Levallois-Perret, Vincennes, Le Pré-Saint-Gervais, Saint-Mandé and Montrouge, all of which border the city proper. The most sparsely populated quarters are the western and central office and administration-focused arrondissements. The city's population is densest in the northern and eastern arrondissements; the 11th arrondissement had a density of in 1999, and some of the same arrondissement's eastern quarters had densities close to in the same year. Notes: Without the Bois de Boulogne and the Bois de Vincennes. References: INSEE Paris agglomeration The city of Paris covers an area much smaller than the urban area of which it is the core. At present, Paris's real urbanisation, defined by the pôle urbain (urban cluster) statistical area, covers , or an area about 27 times larger than the city itself. The administration of Paris's urban growth is divided between itself and its surrounding departments: Paris's closest ring of three adjoining departments, or petite couronne ("small ring") are fully saturated with urban growth, and the ring of four departments outside of these, the grande couronne departments, are only covered in their inner regions by Paris's urbanisation. These eight departments form the larger administrative Île-de-France région; most of this region is filled, and overextended in places, by the Paris aire urbaine, which, in 2017, was populated by over 12 million people. The Paris agglomeration has shown a steady rate of growth since the end of the late 16th century French Wars of Religion, save brief setbacks during the French Revolution and World War II. With an estimated total of 12.2 million inhabitants for 2017, the annual population growth rate of the Île-de-France région lied between 0.3% and 0.9% over the past 50 years. Immigration By law, French censuses do not ask questions regarding ethnicity or religion, but do gather information concerning one's country of birth. From this it is still possible to determine that Paris and its metropolitan area is one of the most multi-cultural in Europe: According to the 2011 census, 456,105 residents of the municipality of Paris, or 20.3 percent, and 2,117,901 residents of the Paris Region (Île-de-France), or 17.9 percent, were born outside France. At the 1999 census, 4.2% of the population in Paris metropolitan area were recent immigrants (people who had immigrated to France between 1990 and 1999),