Map of Facebook usage world-wide in late 2010. The numbers have almost doubled since that time.

1 in every 13 people on earth is on Facebook
http://www.youtube.com/watch?v=68VP0wxyGsQ

1 out of 5 views of all web pages is a Facebook page.
http://www.thesocialmediatoday.com/facebook-2012-some-interesting-facts-infographics/

51% of Canadians are on Facebook.
http://www.socialbakers.com/facebook-statistics/canada

71% of American are on Facebook
http://www.drewsmarketingminute.com/2011/03/facebook-user-statistics-infographic.html

70% of Facebook users are from outside the United States
http://www.youtube.com/watch?v=68VP0wxyGsQ

The majority of all content on Facebook is created by only 20% of all Facebook users.
http://www.jeffkorhan.com/2012/02/facebook-facts-business.html

Facebook plays a role in 1 out of 5 divorces.
http://www.baselinemag.com/c/a/Intelligence/25-Fast-Facts-on-Facebook-764721/

The average Facebook  user has 130 friends
http://www.youtube.com/watch?v=68VP0wxyGsQ

One in 10 pets had its own Facebook page by July last year.
http://www.telegraph.co.uk/technology/social-media/8633183/One-in-ten-pets-is-on-Facebook.html

A Facebook link is added to 10,000 new websites every day.
http://www.youtube.com/watch?v=68VP0wxyGsQ

Facebook can be more addictive than cigarettes or alcohol
http://i2mag.com/facebook-addiction-disorder-new-social-disease-that-bites-many-other-every-second/

With over 800 million users, Facebook is the third largest country in the world.
http://ansonalex.com/infographics/12-interesting-computer-facts-for-2012-infographic/

The Facebook population is three times that of the United States.
http://mashable.com/2012/01/10/facebook-profile-safety/

Facebook is a prime target for cybercrime.
http://mashable.com/2012/01/10/facebook-profile-safety/