LinkedIn may not be in the same league as Facebook and Twitter, but it's catching up. The professional-networking site recently passed the milestone of 100 million users and is growing exponentially. According to the site's creators, a million people are signing up to LinkedIn every week. The site connects members in the same industry, allowing them to network with each other online, and hosts company pages listing employees from firms such as Apple, Cisco, eBay, and Amazon. Here, a look at the numbers behind LinkedIn's growth:
Number of LinkedIn users
The height, in feet, of a hypothetical stack of business cards representing all 100 million LinkedIn members
Number of LinkedIn users in the U.S.
Number of countries with LinkedIn users
Growth over the last year in LinkedIn users from Brazil
Growth over the last year in LinkedIn users from Mexico
Number of users joining LinkedIn every week
Share of LinkedIn users who are in the service industry
Share of LinkedIn users in the high-tech sector. Members in the finance sector represent the same share.
Number of Fortune 500 companies with executives on LinkedIn
Number of teachers with LinkedIn accounts
Number of chocolatiers with LinkedIn accounts
Number of Elvis tribute artists with LinkedIn accounts
Number of LinkedIn users who list "beatboxer" as their profession
Number of LinkedIn users who list "dog or cat psychologist" as their profession
Number of LinkedIn users who list "martini whisperer" as their profession
Amount of time LinkedIn has been in operation. The company launched in May 2003.
LinkedIn's total revenue in 2010. It makes money from recruitment and marketing services and premium subscriptions.
LinkedIn's net income in 2010
Estimated value of LinkedIn, as submitted in its January 2011 filing with the SEC
Number of Facebook users
Facebook's approximate total revenue in 2010
Facebook's approximate net income in 2010
Number of Twitter users who have joined since its launch in 2007
Number of users joining Twitter every week (460,000 every day)
Sources: LinkedIn (2), CNET, TechCrunch, Reuters