Home equity has become a thing of the past for millions of homeowners. Nearly 11 million, to be precise. That’s the number of properties nationwide that had negative equity at the end of the second quarter of 2011, according to market research firm CoreLogic. Using CoreLogic’s data, we’ve illustrated the number and percentage of “underwater” properties (a common term for those with mortgage loans that are larger than what the property is currently worth) in the United States. Hover over each state for the details.