<P> The CIA estimated nominal 2013 gross world product at US $74.31 trillion, giving an annual global per capita figure of around US $10,500 . Around 1.29 billion people (18.4% of the world population) live in extreme poverty, subsisting on less than US $1.25 per day; approximately 870 million people (12.25%) are undernourished. 83% of the world's over-15s are considered literate . In June 2014, there were around 3.03 billion global Internet users, constituting 42.3% of the world population . </P> <P> The Han Chinese are the world's largest single ethnic group, constituting over 19% of the global population in 2011 . The world's most - spoken first languages are Mandarin Chinese (spoken by 12.44% of the world's population), Spanish (4.85%), English (4.83%), Arabic (3.25%) and Hindustani (2.68%). The world's largest religion is Christianity, whose adherents account for 31% of the global population; Islam is the second - largest religion, accounting for 24.1%, and Hinduism the third, accounting for 13.78% . In 2005, around 16% of the global population were reported to be non-religious . </P> <Table> 10 most populous countries <Tr> <Th> Rank </Th> <Th> Country / Territory </Th> <Th> Population </Th> <Th> Date </Th> <Th> Approx.% of world population </Th> <Th> Source </Th> </Tr> <Tr> <Td> </Td> <Td> China </Td> <Td> 1,390,400,000 </Td> <Td> April 17, 2018 </Td> <Td> 18.3% </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> India </Td> <Td> 1,330,560,000 </Td> <Td> April 17, 2018 </Td> <Td> 17.5% </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> United States </Td> <Td> 326,978,000 </Td> <Td> April 17, 2018 </Td> <Td> 4.29% </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Indonesia </Td> <Td> 261,600,000 </Td> <Td> October 31, 2016 </Td> <Td> 3.43% </Td> <Td> </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Pakistan </Td> <Td> 211,268,000 </Td> <Td> April 17, 2018 </Td> <Td> 2.77% </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Brazil </Td> <Td> 208,929,000 </Td> <Td> April 17, 2018 </Td> <Td> 2.74% </Td> <Td> </Td> </Tr> <Tr> <Td> 7 </Td> <Td> Nigeria </Td> <Td> 188,500,000 </Td> <Td> October 31, 2016 </Td> <Td> 2.47% </Td> <Td> </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Bangladesh </Td> <Td> 164,344,000 </Td> <Td> April 17, 2018 </Td> <Td> 2.16% </Td> <Td> </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Russia </Td> <Td> 146,773,226 </Td> <Td> June 1, 2017 </Td> <Td> 1.93% </Td> <Td> </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Japan </Td> <Td> 126,670,000 </Td> <Td> September 1, 2017 </Td> <Td> 1.66% </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Rank </Th> <Th> Country / Territory </Th> <Th> Population </Th> <Th> Date </Th> <Th> Approx.% of world population </Th> <Th> Source </Th> </Tr>

What percentage of the world population is america