First-quarter purchase originations by dollar volume increased 8% year-over-year basis to nearly $146 billion, according to data from RealtyTrac. Roughly $350 billion of first mortgages were originated during the period, 42% of which went toward home purchases. From the nation's coffee capital of Seattle to the desert oasis of Phoenix, here's a look at the 10 markets with a population of more than 500,000 that had the largest growth in home sales activity on a per capita basis during the first quarter, based on data from RealtyTrac.