Let’s face it, you gotta be a little off kilter to take the entrepreneurial plunge. But what is the the actual makeup of entrepreneurs? LinkedIn takes a look today, using data collected from those who’ve identified themselves as a co-founder or founder at U.S. based companies since 2000.

LinkedIn discovered that some companies and universities are “breeding grounds” for entrepreneurs. Those include Apple, Google, Yahoo, eBay (PayPal) and Microsoft, while the top schools for churning out entrepreneurs include MIT, Stanford and Harvard.

Interestingly, the LinkedIn data shows that 65 percent of entrepreneurs are 30 or older. Just two percent are considered serial entrepreneurs.

Here’s a look at a portion of the infographic that LinkedIn produced based on the data.

More on this topic from LinkedIn’s Monica Rogati, who gave a talk titled “Sequencing the Startup DNA” at StartupFest earlier this year.

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