BOSTON – The Executive Office of Labor and Workforce Development reported today that the preliminary July job estimates show an increase of 12,700 jobs, for a total of 3,246,800 jobs in Massachusetts. The private sector gained 11,600 jobs. The July total unemployment rate remained at 7.6 percent, well below the national rate of 9.1 percent.Six of the ten private sectors added jobs in July with the largest over the month gains in Education and Health Services; Other Services; Trade, Transportation and Utilities; Manufacturing; Professional and Business Services; and Financial Activities. The July job gain follows a revised 9,400 job gain in June, previously reported as a 10,400 job gain.Over-the-year (July 2010 to July 2011), jobs are up 56,800, for a growth rate of 1.8 percent. Private sector jobs are up 61,900, a growth rate of 2.2 percent, with gains in nine of the ten sectors. Year-to-date, (December 2010 to July 2011), 53,000 jobs have been added in the Bay State with 58,200 jobs in the private sector.