How many Atheists are there?

In a 2001 US census it was deemed that 15% of the American population considered themselves to be Atheist or Agnostic although some other polls found this figure to be closer to 10%.

Globally figures differ vastly. In Japan 65% of the population claim to be Agnostic or Atheist, whilst in the UK and in Australia the figure is closer to 25% of their population.

Atheism Questions:

• Are Atheism and Agnosticism compatible?
• Do Atheists have an agenda?
• How many Atheists are there?
• Is Atheism a religion?
• What do Atheists base their morals on?
• What is Atheism?
• What is the difference between Atheism and Agnosticism?
• What is the difference between weak and strong Atheism?