Washington’s average annual wage grew by 3.4 percent in 2012, to $51,595, surpassing $50,000 for the first time, according to the state Employment Security Department.

The average weekly wage rose from $959 to $992.

These figures include only those wages that are covered by unemployment insurance.

Much of the increase was driven by a 6.1 percent increase in the number of insured workers earning more than $75,000. The three industries with the highest wage growth in 2012 were the company management sector, up 17.6 percent; information, up 11.5 percent; and agriculture, up 11.5 percent.