Saudi Arabia’s economy grew 2.8% in the third quarter from the same period a year earlier, supported by an increase in non-oil activity, government data showed on Sunday. The growth rate was in line with preliminary data reported in October. Non-oil output rose 4.3% in the quarter from a year earlier, government activity increased 3.1% and the oil sector edged up 0.05%, according to data released by the General Authority for Statistics. Compared with the previous three months, real gross domestic product grew by 0.9% in the third quarter, the statistics authority said.