Statistics How fast is the world's population growing?

World Population

How fast is the world's population growing?
The world population reached 1 billion around 1800 (that's about 6 to 10 thousand years of human history).

The world population reached 2 billion around 1930 (that's 130 years after the 1 billion mark).

The world population reached 6 billion in 1999 (that's 4 billion increase in less than 70 years).

The US Census Bureau estimates that the world population will reach 7 billion in 2012 (that's a 1 billion increase in 13 years).