Interesting thing on the BBC site today which tells you what number of the 7 billion people on Earth you are -
http://www.bbc.co.uk/news/world-15391515
When I was born I was the:
5,564,145,153rd person alive on Earth
And the:
80,790,163,544th to have lived since the Earth began
And the Earth's population has grown by 229 while I was doing that
I find it quite surprising that the population of the world has increased by nearlt 1.5 billion since I was born