Consumers spent $36.4 billion in the 2010 holiday shopping season, a 15.4 percent increase from the prior year, according to a new survey, MarketWatch.com reported. The survey from MasterCard Advisors SpendingPulse tracked national retail and services sales between Oct. 31 and Dec. 24. The survey found that consumers spent the most on apparel, with online apparel sales accounting for 18.8 percent of total sales for that category against 16.9 percent in 2009. Online electronics also logged big gains, though jewelry lagged. There were six days during the 2010 shopping season during which sales topped $1 billion, compared with three such days in 2009.