Single-family originations will likely dip in 2012 because of fewer refinances, according to Frank Nothaft, chief economist at Freddie Mac. The market will see a refinance burnout, Nothaft said, with a dwindling pool of eligible borrowers and higher mortgage rates by the second half of 2012. Nothaft projects $1.3 trillion in single-family mortgage originations in 2011, compared to $1.14 trillion in 2012 and $1.07 trillion in 2013. The Freddie Mac projections for 2012 come as a Pew Research Center study showed a record-low number of adults married in the U.S. About 51% of all adults were married as of 2010,...