Currently, the number of people living in the world is about 7.6 billion. The world’s population has been growing at an increasing rate since 1317 (when the Great Famine ended). The highest world’s population growth rate of over 1.8% annually occurred from 1955 to 1975. The highest growth rate ever experienced was from 1965 to 1970 when it grew by 2.06%. From 2010 to 2015, it reduced to 1.18%, and it is expected to decrease further during the 21st century. The population growth rate varies with each country with some big nations by land size having a smaller percentage share of the global population like in the case of Russia and Canada while others smaller countries like Nigeria ranking among the most populous nations.
The Most Populous Nations in the World
China is the most populated country in the world with about 1,392,600,000 people which is 18.2% of the global population. China has been the most populous nation in the world for centuries now. China had a population of over 583 million by 1949 which doubled to 1.2 billion by 2000. The high growth rate forced the Chinese government to introduce the one-child policy in 1979. The one-child policy helped China’s growth rate reduce while creating an imbalance between the older and the young population. The imbalance forced the government to introduce the two-child policy in 2016 which saw the birth rate grow by 7.9%.
India is the second most populous state on earth with a population of about 1,324,354,000. The number of Indians reached a billion in 1998, and by 2010 it had grown to 1.2 billion. With an annual growth rate of about 1.2%, India is projected to be the most populous nation on earth by 2024. India’s share of the global population is about 17.5% which has grown from 16.3% in 1990. Over fifty percent of the population is below 25 years of age, and the average age of the Indian community is expected to be 29 years by 2020. Currently, the sex ratio of female to male in India has grown to 944:1000 as compared to 2011 when it was 940:1000.
3) United States
The United States is the third biggest nation in the world by both land area and population. The country’s population of over 327,374,000 Americans represents 4.29% of the global community. The country’s share of the world’s population has been on a downward trend since 1955 when it was 6.2%. This is attributed to the reduction in population growth rate from 1.58% in 1955 to 0.71% in 2017. The United State’s share of the global population has been reducing even with the increase in the number of immigrants into the country.
Future World Population Projections
Currently the Chinese have the most significant share of the world’s population followed by the Indians and the Americans, but this is about to change in the next few years since their growth rate has reduced. China’s share has been decreasing in the last few decades while India’s population has been growing. The one-child policy helped China control their population's growth rate, and India is projected to surpass them before 2024. The expected 2030 people estimate shows that India will have a bigger share followed by China and Nigeria will improve in rank from position seven to five.
Countries By Percentage of World Population
|Rank||Country||Share of World's Population|
|18||Democratic Republic of the Congo||1.07%|