its getting crowded here

At the beginning of the twentieth century, the entire world population was less than 2 billion people. Today, the current world population exceeds six billion (6,396,000,000) people.

Some demographics:

• Top 20 World Population: The most populated countries of the world.
• Population Density: Countries with the highest population density.
• Summary of the World: Earth as a village of precisely 100 people.

Via NationsOnline