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.
Demographics of Europe
As it stands now, around 12% of the world's people live in Europe. If demographic trends keep their pace, its share may fall to around 7% in 2050, but still amounting to 716 million people in absolute numbers, according to the United Nations estimate. (The decline in the percentage is partly due to high fertility rates in other parts of the world.) The sub-replacement fertility and high life expectancy in most European states mean a declining and aging population as it is not offset by the current immigration level. This situation is expected to be a challenge for their economies, political and social institutions. Countries on the edges of Europe, except for southern Europe, have generally stronger growth than Central European counterparts. Albania and Ireland have strong growth, hitting over 1% annually.