(ANSA) - SOFIA - According to the preliminary data released by Bulgarian National Statistical Institute, the Industrial Production Index, seasonally adjusted, increased by 2.3% in March 2018 as compared to February 2018. In March 2018 working day adjusted Industrial Production Index rose by 1.7% in comparison with the same month of 2017. In March 2018 as compared to February 2018, the seasonally adjusted Industrial Production Index increased in the electricity, gas, steam and air conditioning supply by 3.8%, in the manufacturing by 1.4%, and in the mining and quarrying industry by 0.2%. On annual basis in March 2018 Industrial Production Index calculated from working day adjusted data rose in the electricity, gas, steam and air conditioning supply by 7.8% and in the manufacturing by 0.7%, while the production fell in the mining and quarrying industry by 8.7%. In the manufacturing, the more considerable increases compared to the same month of the previous year were registered in the manufacture of other transport equipment by 52.4%, in the repair and installation of machinery and equipment by 15.1%, in the manufacture of electrical equipment by 10.7%, in the manufacture of motor vehicles, trailers and semi-trailers by 9.6%. (ANSA).