2015: 7.3 billion
2030: 8.5 billion
2050: 9.7 billion
2100: 11.2 billion
Africa will account for over half the population growth up until 2050 with an addition of 1.3 billion, followed by Asia with an increase of 0.9 billion. Northern America, Latin America/Caribbean and Oceania will have smaller increases.
Nine countries are expected to account for more than half of the world’s projected population increase over the period 2015-2050: India, Nigeria, Pakistan, the Democratic Republic of Congo, Ethiopia, the United Republic of Tanzania, the United States of America, Indonesia, and Uganda
After 2050, Africa is projected to be the only major area with a substantially increasing population.
Fertility rates are currently declining in almost all areas of the world and will continue to decrease from 2.5 children per woman in 2015 to 2.25 in 2050 to 2.0 in 2095-2100. These rates still allow for the global population to increase, however certain countries in Europe are expected to have decreasing populations by 2100. Even with a net number of international migrants projected at 31 million, Europe’s population is expected to shrink by around 32 million.
By 2050 global life expectancy is set to rise from 70 to 77, and by 2100 to increase to 83 years. In 2015, there are twice as many children under 15 compared to people aged 60 or above. By 2050 it’s projected that there will be an equal number of people under 15 and over 60. 
1] United Nations Department of Economic and Social Affairs/Population Division 7
World Population Prospects: The 2015 Revision, Key Findings and Advance Tables
Updated 29 July 2015, accessed 27 September 2015
Welltuned City is a web-adaption of one narrative stream from the larger interactive installation Sounding the Future. © Gail Priest 2014-16