Fueled by demand from banks, jumbo mortgages accounted for 19.0 percent of total mortgage originations in 2014, according to Inside Mortgage Finance, the highest it has been since 2002. But last year’s jumbo production volume, estimated at $235.0 billion, was down 13.6 percent from 2013. However, total originations declined by 34.4 percent in that time. An estimated $67.0 billion in jumbos were originated in the fourth quarter of 2014 ... [Includes one data chart]