reached 8 billion in 2022, according to United Nations estimates. is projected to reach 9 billion in 2037, and 10 billion in 2060. has doubled in 40 years from 1959 (3 billion) to 1999 (6 billion). is currently (2024) growing at a rate of around 0.87% per year, adding around 71 million people per year to the total. growth rate reached its peak in the late 1960s, when it was at 2.09%. growth rate i