Nigeria is
projected to be the world’s third most populous country by the year 2050,
according to a report released by the UN Department of Economic and Social
Affairs.
The report
titled “World Population Prospects: The 2017 Revision”, said with such development,
Nigeria would overtake the United States in terms of population just as world
population would reach 9.8 billion people.
The report
said: “By 2050, the third most populous country will be Nigeria, which
currently ranks seventh, and which is poised to replace the United States.
“Among the
10 largest countries of the world, one is in Africa (Nigeria). Nigeria’s
population, currently the seventh largest in the world, is growing the most
rapidly.
Consequently,
the population of Nigeria is projected to surpass that of the United States
shortly before 2050, at which point it would become the third largest country
in the world.”
The report
said in 2050, the populations in six of the 10 largest countries are expected
to exceed 300 million. The countries are China, India, Indonesia, Nigeria,
Pakistan, and United States of America (in alphabetical order). Africa, which
has the youngest age distribution of any region, is projected to experience a
rapid aging of its population. “Although the African population will remain
relatively young for several more decades, the percentage of its population
aged 60 or over is expected to rise from five per cent in 2017 to around nine
per cent in 2050, and then to nearly 20 per cent by the end of the century.” In
addition, the birth rates in African countries are likely to “at least double”
by 2050, according to the report.
That trend
came in spite of lower fertility rates in nearly all regions of the world,
including in Africa, where rates fell from 5.1 births per woman up to 2005 to
4.7 births in the five years following. In terms of other population trends
depicted in the report, the population of India, which currently ranks as the
second most populous country with 1.3 billion inhabitants, will surpass China’s
1.4 billion citizens, by 2024.
The report
noted that the world population, now at least 7.6 billion, was up from 7.4
billion in 2016, adding that the concentration of global population growth is
in the poorest countries.
The report
said in spite of an overall drop in the number of children people have around
the globe, the population was spurred by the relatively high levels of
fertility in developing countries.
“With
roughly 83 million people being added to the world’s population every year, the
upward trend in population size is expected to continue, even assuming that
fertility levels will continue to decline.
“At this
rate, the world population is expected to reach 8.6 billion in 2030, 9.8
billion in 2050 and surpass 11.2 billion in 2100,” the report further revealed.
The growth
is expected to come, in part, from the 47 least developed countries, where the
fertility rate is around 4.3 births per woman, and whose population is expected
to reach 1.9 billion people in 2050 from the current estimate of one billion.
In contrast,
the birth rates in Europe are up to 1.6 births per woman, up from 1.4 births in
2000 to 2005.
“During 2010
to 2015, fertility was below the replacement level in 83 countries comprising
46 per cent of the world’s population,” according to the report.
The lower
fertility rates are resulting in an ageing population, with the number of
people aged 60 or over expected to more than double by 2050 and triple by 2100,
from the current 962 million to 3.1 billion.
The UN
Department said the population growth presented a challenge as the
international community sought to implement the 2030 Sustainable Development
Agenda seeking to end poverty and preserve the planet.
The report
also noted the impacts of migrants and refugees between countries, in
particular noting the impact of the Syrian refugee crisis and the estimated
outflow of 4.2 million people.
In terms of
migration, “although international migration at or around current levels will
be insufficient to compensate fully for the expected loss of population tied to
low levels of fertility, especially in the European region, the movement of
people between countries can help attenuate some of the adverse consequences of
population ageing”.

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