Europe
In 2017, the population of Europe was estimated to be 742 million according to , which is slightly more than one-ninth of the world's population. This number includes Asian Russia (Siberia, about 36 million people) but excludes the European part of Turkey, Cyprus and the Transcaucasian countries.
A century ago, Europe had nearly a quarter of the world's population. The population of Europe has grown in the past century, but in other areas of the world (in particular Africa and Asia) the population has grown far more quickly. Among the continents, Europe has a relatively high population density, second only to Asia. Most of Europe is in a mode of Sub-replacement fertility, which means that each new(-born) generation is being less populous than the older.
The most densely populated country in Europe (and in the world) is the microstate of Monaco.
Immigration to Europe
Since 2000, Spain has absorbed around six million immigrants, adding 12% to its population. The total immigrant population of the country now exceeds 5,730,677 (12.2% of the total population). According to residence permit data for 2011, more than 710,000 were Moroccan, another 410,000 were Ecuadorian, 300,000 were Colombian, 230,000 were Bolivian and 150,000 were Chinese; from the EU around 800,000 were Romanian, 370,000 (though estimates place the true figure significantly higher, ranging from 700,000 to more than 1,000,000) were British, 190,000 were German, 170,000 were Italian and 160,000 were Bulgarian. A 2005 regularisation programme increased the legal immigrant population by 700,000 people that year. By world regions, in 2006 there were around 2,300,000 from the EU-27, 1,600,000 from South America, 1,000,000 from Africa, 300,000 from Asia, 200,000 from Central America & Caribbean, 200,000 from the rest of Europe, while 50,000 from North America and 3,000 from the rest of the world.