The number of children living with a parent who has been out of work for at least six months has tripled since the recession started in 2007.

Throughout 2013, an average of 2.3 million children — or about 3.3% of all kids in the U.S. — lived with a parent who had been seeking work for at least half a year, according to new figures from the Urban Institute, a Washington think tank. That’s up from about 754,000 in 2007.