I posted this in another thread and got drowned out by a Michael Moore discussion, this seems a better place for it.
What was the population when you were born?
http://www.bbc.co.uk/news/world-15391515
When I was born, I was the:5,326,040,655th person alive on Earth and
80,403,571,121st person to have lived since history began
297 people = the amount the population has grown while you've been on this site
How the number is calculated.
Both numbers have been calculated using UN Population Division figures. The first is an estimate of how many people were alive on your date of birth. It is one possible value based on global population figures and estimates of growth rates over time. Data before 1950 is less accurate than figures after that date. The second number includes calculations based on the methodology of scholar Carl Haub, who estimated how many people had been alive since 50,000 B.C. His calculation has been amended by the UN to include additional points in time.