2011: By the Numbers

Bookshop employees pile up copies of a biography of the late "Apple" co-founder Steve Jobs, left, and Harry Potter, Ollivander in Warner Bros. Pictures' "HARRY POTTER AND THE DEATHLY HALLOWS- Part 2." (Getty Images; Warner Bros. Pictures)

$1.3 billion: Ticket sales of the top-grossing film of 2011, "Harry Potter and the Deathly Hallows Part 2."

Over 150: Words added to 2011 edition of "Merriam-Webster Collegiate Dictionary." They include "bromance," "crowdsourcing" and "tweet."

10: Percentage of all status updates in English that mentioned Osama Bin Laden's death on May 1, the day the news broke, making it number 1 on Facebook's list of Top 10 Global Topics of 2011.

17 million: Number of followers Lady Gaga has on Twitter, making her the site's most followed.

Getty Images; Warner Bros. Pictures

Bookshop employees pile up copies of a... View Full Size

Getty Images; Warner Bros. Pictures

Bookshop employees pile up copies of a biography of the late "Apple" co-founder Steve Jobs, left, and Harry Potter, Ollivander in Warner Bros. Pictures' "HARRY POTTER AND THE DEATHLY HALLOWS- Part 2."

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379,000: Copies of "Steve Jobs," by Walter Isaacson, sold during its first week, according to BookScan. Amazon.com recently announced it is the bookseller's top-selling book of 2011.

5 million: Number of units sold of Adele's "21," the top-selling CD of 2011.

115: Age of Bessie Cooper, of Monroe, Ga., the oldest person in the world.

445: Number of U.S. military deaths in 2011 (to date).

20 million: Number of downoads of Tap Zoo, the top-grossing app of 2011.

Watch "The Year With Katie Couric" now and click here for more on "The Year" from People magazine.