SO 320 2009 World Population & Events

2009 World Population

U.S. 306,959,275
World 6,772,290,919
13:12 GMT (EST+5) Jul 20, 2009

http://www.census.gov/ipc/www/idb/worldpopinfo.php

World Vital Events

World Vital Events Per Time Unit: 2009
(Figures may not add to totals due to rounding)
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Natural
Time unit Births Deaths increase
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Year 134,434,533 56,622,740 77,811,793
Month 11,202,878 4,718,562 6,484,316
Day 368,314 155,131 213,183
Hour 15,346 6,464 8,883
Minute 256 108 148
Second 4.3 1.8 2.5
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Source: U.S. Census Bureau, International Data Base.

Notes on the World POPClock and
World Vital Events

The populations displayed on the clock are not intended to imply that the population of the world is known to the last person. Rather, the clock is our estimate of the world population size and an indication of how fast it is growing. According to the current estimates, the world population reached 6 billion on May 16, 1999, at about 10:23 AM GMT (May 16, 1999 at 5:23 AM EDT). Because of the uncertainties of the estimates, and the fact that we are constantly updating our estimates, the estimate of when 6 billion was hit will change. The United Nations, whose population estimates differ somewhat from our figures, celebrated the "Day of 6 Billion" on October 12, 1999. The Census Bureau's new projections indicate that the 7 billion marker will be reached in July of 2012.
The world population estimates and projections used to produce these figures were developed by the International Programs Center based on analysis of available data on population, fertility, mortality, and migration. The analysis was performed separately for the countries or areas of the world with a population of 5,000 or more. Population estimates and projections analyses are based on census, survey, and administrative information. For most countries, and especially less developed countries, adjustment of the data is necessary to correct for errors, omissions, and inconsistencies in the data. Since the most recent data for each country are often at least 2 years old (and for most countries they are older), the population figures used for the clock are projections from those estimates based on assumed trends in fertility, mortality, and migration. As new data become available, all data are reevaluated and past conclusions may change. For general information about how these estimates and projections are made, see the "Population Estimates and Projections Methodology". These estimates and projections are contained in the International Data Base.
The World midyear population and vital event estimates result from an aggregation of the figures for the individual countries and areas. The intermediate population estimates are based on a linear interpolation between successive midyear population figures. World vital events for different units of time are computed based on the number of months, days, hours, minutes, or seconds in the given year.
Figures may not add to totals due to rounding.
http://www.census.gov/ipc/www/popwnote.html

World Population: 1950-2050


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 2043, an increase of 50 percent that is expected to require 44 years.
http://www.census.gov/ipc/www/idb/worldpopgraph.php






World Population Growth Rates: 1950-2050


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.
http://www.census.gov/ipc/www/idb/worldgrgraph.php


World Population Growth Rates: 1950-2050


In addition to growth rates, another way to look at population growth is to consider annual changes in the total population. The annual increase in world population peaked at about 88 million in the late 1980s. The peak occurred then, even though annual growth rates were past their peak in the late 1960s, because the world population was higher in the 1980s than in the 1960s.
http://www.census.gov/ipc/www/idb/worldpopchggraph.php