The United Nations projects that the current world population of close to 7 billion will reach 10.1 billion in the next ninety years, reaching 9.3 billion by the middle of this century, according to the medium variant of the 2010 Revision of World Population Prospects, the official United Nations population projections.
Much of this increase is projected to come from the high-fertility countries, which comprise 39 countries in Africa, nine in Asia, six in Oceania and four in Latin America.
The highest potential for future population growth is in high-fertility countries. Between 2011 and 2100, the medium variant projects that the population of the high-fertility countries would more than triple, passing from 1.2 billion to 4.2 billion. During the same period, the population of the intermediate-fertility countries would increase by just 26 per cent, from 2.8 billion to 3.5 billion, while that of the low-fertility countries would decline by about 20 per cent, from 2.9 billion to 2.4 billion.
Globally, life expectancy is projected to increase from 68 years in 2005-2010 to 81 in 2095-2100.
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