The current world population of 7.6 billionis expected to reach 8.6 billion in 2030, 9.8 billion in 2050 and 11.2billion in 2100, according to a new United Nations (UN) report launchedtoday.With roughly 83 million people being added to the world’s population everyyear, the upward trend in population size is expected to continue.The ‘World Population Prospects: The 2017 Revision’, published by the UNDepartment of Economic and Social Affairs, provides a comprehensive review ofglobal demographic trends and prospects for the future. The information isessential to guide policies aimed at achieving the new SustainableDevelopment Goals (SDGs).
The report highlighted that a reduction in the fertility level results notonly in a slower pace of population growth but also in an older population.Compared to 2017, the number of persons aged 60 or above is expected tomore than double by 2050 and to more than triple by 2100, rising from 962million globally in 2017 to 2.1 billion in 2050 and 3.1 billion in 2100.In Europe, 25 percent of the population is already aged 60 years or over.That proportion is projected to reach 35 percent in 2050 and to remain aroundthat level in the second half of the century.
Populations in other regions are also projected to age significantly overthe next several decades and continuing through 2100.Globally, the number of persons aged 80 or over is projected to triple by2050, from 137 million in 2017 to 425 million in 2050. By 2100, it isexpected to increase to 909 million, nearly seven times its value in 2017.
Population ageing is projected to have a profound effect on societies,underscoring the fiscal and political pressures that the health care, old-agepension and social protection systems of many countries are likely to face inthe coming decades.From 2017 to 2050, it is expected that half of the world’s populationgrowth will be concentrated in just nine countries: India, Nigeria, theDemocratic Republic of the Congo, Pakistan, Ethiopia, the United Republic ofTanzania, the United States of America, Uganda and Indonesia.
The concentration of global population growth in the poorest countriespresents a considerable challenge to governments in implementing the 2030Agenda for Sustainable Development, which seeks to end poverty and hunger,expand and update health and education systems, achieve gender equality andwomen’s empowerment, reduce inequality and ensure that no one is left behind.Substantial improvements in life expectancy have occurred in recent years.Globally, life expectancy at birth has risen from 65 years for men and 69years for women in 2000-2005 to 69 years for men and 73 years for women in2010-2015.There continue to be large movements of migrants between regions, oftenfrom low-and middle-income countries toward high-income countries. The volumeof the net inflow of migrants to high-income countries in 2010-2015 (3.2million per year) represented a decline from a peak attained in 2005-2010(4.5 million per year).