It’s expected that social media CEOs like Facebook’s Mark Zuckerberg and Twitter’s Jack Dorsey would use their own networks, but what about other corporate leaders? It turns out that 70 percent of Fortune 500 CEOs have no presence on social media sites, and none of the 30 percent who do are on Pinterest. Take a look at this visualization of CEO.com’s 2012 Fortune 500 Social CEO Index.

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