The United States has about the same ratio of surveillance cameras to citizens as China, according to a study by IHS Markit.
China had 350 million cameras in 2018, an estimated one camera for every 4.1 people. The country is expected to have more than 560 million cameras by 2021.
America's total is expected to rise from 70 million cameras to around 85 million cameras by 2021. Right now the U.S. has one camera for every 4.6 people.
Taiwan had the third-highest ratio, with one camera for every 5.5. citizens in 2018, followed by the UK and Ireland at one camera for every 6.5 people, and Singapore at one camera for every 7.1 people.
Although the ratios for both the U.S. and China may be similar, the cameras are used for different purposes. Cameras in China are used as widespread video surveillance of cities, while cameras in the U.S. are primarily installed for retail and commercial use.