Difference between revisions of "What are the global population trends?"
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==Population== | |||
The world population increased from 3 billion in 1959 to 6 billion by 1999, a doubling that occurred over 40 years. The Census Bureau's latest projections imply that population growth will continue into the 21st century, although more slowly. The world population is projected to grow from 6 billion in 1999 to 9 billion by 2044, an increase of 50 percent that is expected to require 45 years. | The world population increased from 3 billion in 1959 to 6 billion by 1999, a doubling that occurred over 40 years. The Census Bureau's latest projections imply that population growth will continue into the 21st century, although more slowly. The world population is projected to grow from 6 billion in 1999 to 9 billion by 2044, an increase of 50 percent that is expected to require 45 years. | ||
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Source: US census bureau, International database, http://www.census.gov/ipc/www/idb/worldpopgraph.php, last retrieved Aug 22, 2010 | Source: US census bureau, International database, http://www.census.gov/ipc/www/idb/worldpopgraph.php, last retrieved Aug 22, 2010 | ||
==Growth rate== | |||
The world population growth rate rose from about 1.5 percent per year from 1950-51 to a peak of over 2 percent in the early 1960s due to reductions in mortality. Growth rates thereafter started to decline due to rising age at marriage as well as increasing availability and use of effective contraceptive methods. Note that changes in population growth have not always been steady. A dip in the growth rate from1959-1960, for instance, was due to the Great Leap Forward in China. During that time, both natural disasters and decreased agricultural output in the wake of massive social reorganization caused China's death rate to rise sharply and its fertility rate to fall by almost half. | The world population growth rate rose from about 1.5 percent per year from 1950-51 to a peak of over 2 percent in the early 1960s due to reductions in mortality. Growth rates thereafter started to decline due to rising age at marriage as well as increasing availability and use of effective contraceptive methods. Note that changes in population growth have not always been steady. A dip in the growth rate from1959-1960, for instance, was due to the Great Leap Forward in China. During that time, both natural disasters and decreased agricultural output in the wake of massive social reorganization caused China's death rate to rise sharply and its fertility rate to fall by almost half. | ||
Source: US census bureau, International database, http://www.census.gov/ipc/www/idb/worldgrgraph.php, last retrieved Aug 22, 2010 | Source: US census bureau, International database, http://www.census.gov/ipc/www/idb/worldgrgraph.php, last retrieved Aug 22, 2010 | ||
==Demographics== | |||
In 2025, nearly 2/3 of the population will live in Asia. <br> | In 2025, nearly 2/3 of the population will live in Asia. <br> | ||
30% of the European Union population will be over 65. In 2030, it is expected to have 2 people in age of work per elderly person (compared to 4 people per elderly person today).<br> | 30% of the European Union population will be over 65. In 2030, it is expected to have 2 people in age of work per elderly person (compared to 4 people per elderly person today).<br> | ||
==Projections dependent on continued declines in fertility== | |||
Fertility in the less developed countries as a whole is projected to decline from 2.75 children per woman in 2005-2010 to 2.05 in 2045-2050. The decline in the group of the 50 least developed countries is expected to be even sharper: from 4.63 children to 2.50 children per woman. However, realization of these projections is contingent on continued declines in fertility, even as funding for family planning has been declining. | Fertility in the less developed countries as a whole is projected to decline from 2.75 children per woman in 2005-2010 to 2.05 in 2045-2050. The decline in the group of the 50 least developed countries is expected to be even sharper: from 4.63 children to 2.50 children per woman. However, realization of these projections is contingent on continued declines in fertility, even as funding for family planning has been declining. | ||
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Source: UNFPA, 2009, http://www.unfpa.org/pds/trends.htm | Source: UNFPA, 2009, http://www.unfpa.org/pds/trends.htm | ||
==International migrations== | |||
international migration will develop and without an important inflow of immigrants, EU population will start to decrease as from 2012. If the current trends continue, there will be almost 250 million migrants in the world in 2025 of which 65% will be established in the developed countries. | international migration will develop and without an important inflow of immigrants, EU population will start to decrease as from 2012. If the current trends continue, there will be almost 250 million migrants in the world in 2025 of which 65% will be established in the developed countries. | ||
Source: European Commission report, the world in 2025, http://ec.europa.eu/research/social-sciences/pdf/the-world-in-2025-report_en.pdf | |||
==Population in cities== | |||
In 2008, 49.9% of the worldwide population live in cities. | In 2008, 49.9% of the worldwide population live in cities. | ||