The biggest share of allocation of 23.54% of the total budget in 2017-18, was education as per the economic survey of Delhi . The amount has doubled from Rs. 5,491 crore in 2012-13 to Rs.11,300 crore in 2017-18, which is the total investment in the sector. The number of schools, student enrolment and student teacher ratio also went up in the same period . It was highlighted after the survey. In Delhi number of schools increased from 5,155 in 2012-13 to 5,772 in 2016-17, and the number of students enrolled in the schools increased from 42.68 lakh in 2012-13 to 44.43 lakh in 2016-17, the survey said. The student teacher ratio also bettered itself to 30:1. Construction of 19 new school buildings has been completed and around 6,787 additional classrooms have been made functional in various existing schools. The survey stated that an integrated approach was adopted for capacity building by the SCERT, whereby apart from innovative in-house capacity building programmes, 89 heads of schools were given exposure to various national and international institutions of repute. Through private sports academies government has also started sports coaching and training sessions. In 2012-13 the number of higher education institutes increased from 209 in 2012-13 to 219 in 2017-18 and the number of technical institutes in the national Capital was reported to have gone up from 99 in 2012-13 to 104 in 2016-17. There is a sharp increase in the number of students of technical institutes from 23,581 in 2012-13 to 34,168 in 2016-17.