Nearly half the jumbo mortgages originated in 2004 were made in California, according to a new analysis of Home Mortgage Disclosure Act data for last year. A total of $336.4 billion of loans over the Fannie/Freddie purchase limit were originated in California last year, up about 3.4 percent from the state’s jumbo production in 2003. Overall, jumbo originations sank about 3.9 percent in 2004, according to Geosegment Systems, a market research firm. … [One data table included]